Oct. 2022, Key Scientific Article, Advances in Engineering

May 2019, Key Scientific Article, Advances in Engineering

May 2015, ターボ機械協会小宮賞

Dec. 2013, グッドデザイン・ものづくりデザイン賞（中小企業庁長官賞）, 公益財団法人日本デザイン振興会

Oct. 2013, グッドデザイン賞, 公益財団法人日本デザイン振興会

Feb. 2009, 日本機械工業連合会会長賞

Sep. 2008, ターボ機械協会チャレンジ大賞

May 2008, ターボ機械協会賞（技術賞）

Apr. 2007, 日本機械学会奨励賞（技術）

Mar. 2007, 日亜賞

Hydraulic Design Method for Gravitational Vortex Type Water Turbines
Yasuyuki Nishi; Ryota Ando; Kenta Saito, Lead
International Journal of Fluid Machinery and Systems, Apr. 2025, [Reviewed]

Improvement of bubble distribution characteristics through multi-objective optimization of flow characteristics of a swirling flow type microbubble generator with fixed blades
Yasuyuki Nishi; Hiroyuki Kogawa; Yuta Utsumi; Masatoshi Futakawa, Lead
Chemical Engineering Research and Design, Dec. 2024, [Reviewed]

Cavitation Characteristics and Internal Flow of a Closed-Type Single Blade Centrifugal Pump
Yasuyuki Nishi; Chunqi Wang, Lead
International Journal of Fluid Machinery and Systems, Oct. 2024, [Reviewed]

Multi-Objective Optimization of an Undershot Cross-Flow Water Turbine Operating in a Free Surface Flow Field
Yasuyuki Nishi; Mikihiro Shindo; Yuichiro Yahagi, Lead
International Journal of Fluid Machinery and Systems, Jul. 2024, [Reviewed]

Erratum to: Internal Flow Structure and Hydraulic Loss of Closed-Type Centrifugal Pumps with a Single Blade
Yasuyuki Nishi; Takahiro Noji; Chunqi Wang, Lead
International Journal of Fluid Machinery and Systems, May 2024, [Reviewed]

Optimization Design of Thin Multi-Blade Fan
Yasuyuki Nishi; Hirofumi Fujikawa; Seiya Terunuma; Imran Bin Khairrul Saleh, Lead
International Journal of Fluid Machinery and Systems, Jan. 2024, [Reviewed]

Internal Flow Structure and Hydraulic Loss of Closed-Type Centrifugal Pumps with a Single Blade
Yasuyuki Nishi; Takahiro Noji; Chunqi Wang, Lead
International Journal of Fluid Machinery and Systems, Dec. 2023, [Reviewed]

Multi-objective optimization of an axial flow hydraulic turbine with a collection device to be installed in an open channel
Yasuyuki Nishi; Hiromichi Koga; Yi Hong Wee, Lead
Renewable Energy, Jun. 2023, [Reviewed]

Multi-Objective Optimization of the Collection Device Shape of an Axial Flow Hydraulic Turbine with a Collection Device
Yasuyuki Nishi; Hiromichi Koga; Terumi Inagaki, Lead
International Journal of Fluid Machinery and Systems, Mar. 2023, [Reviewed]

Hydraulic Loss and Internal Flow of a Pump Equipped with an Impeller with Radial and Annular Flow Channels
Takeshi Konishi; Yasuyuki Hirano; Yasuyuki Nishi, Last
International Journal of Fluid Machinery and Systems, Jan. 2023, [Reviewed]

Rotor Design Method for a Propeller-Type Wind Turbine that Combines Optimization Method with the Blade Element Momentum Theory
Yasuyuki Nishi; Nozomi Mori; Terumi Inagaki, Lead
International Journal of Fluid Machinery and Systems, Jan. 2023, [Reviewed]

Performance and radial thrust of single-blade reverse running pump turbine
Yasuyuki Nishi; Natsumi Itoh; Junichiro Fukutomi, Lead
Renewable Energy, Dec. 2022, [Reviewed]

Flow Structure and Slipstream Characteristics of an Axial Flow Hydraulic Turbine with a Collection Device in an Open Channel
Yasuyuki Nishi; Hiroto Sasashita; Terumi Inagaki, Lead
International Journal of Fluid Machinery and Systems, Jun. 2022, [Reviewed]

Study on the design method for axial flow runner that combines design of experiments, response surface method, and optimization method to one-dimensional design method
Yasuyuki Nishi; Nozomi Mori; Naoki Yamada; Terumi Inagaki, Lead
Renewable Energy, Feb. 2022, [Reviewed]

Performance and Flow Field of Gravitation Vortex Type Water Turbine using Volute Tank
Yasuyuki Nishi; Daichi Sukemori; Terumi Inagaki, Lead
International Journal of Fluid Machinery and Systems, Jul. 2021, [Reviewed]

Loss analysis of gravitation vortex type water turbine and influence of flow rate on the turbine’s performance
Yasuyuki Nishi; Ryouta Suzuo; Daichi Sukemori; Terumi Inagaki, Lead
Renewable Energy, Aug. 2020, [Reviewed]

Study on an Impeller with Radial and Circumferential-Flow Channels
Takeshi Konishi; Yasuyuki Hirano; Yasuyuki Nishi, Last
International Journal of Fluid Machinery and Systems, Jun. 2020, [Reviewed]

Erratum to: Flow Structure in Casing of Closed-Type Centrifugal Pump with Single Blade
Yasuyuki Nishi; Takahiro Noji, Lead
International Journal of Fluid Machinery and Systems, May 2020, [Reviewed]

Effect of flow rate on performance and flow field of an undershot cross-flow water turbine
Yasuyuki Nishi; Yuichiro Yahagi; Takashi Okazaki; Terumi Inagaki, Lead
Renewable Energy, Apr. 2020, [Reviewed]

Flow Structure in Casing of Closed-Type Centrifugal Pump with Single Blade
Yasuyuki Nishi; Takahiro Noji, Lead
International Journal of Fluid Machinery and Systems, Mar. 2020, [Reviewed]

Study on Foreign Body Passage in an Ultra-Small Axial Flow Hydraulic Turbine
Yasuyuki Nishi; Tomoyuki Kobori; Yutaka Kobayashi; Terumi Inagaki; Norio Kikuchi, Lead
International Journal of Fluid Machinery and Systems, Feb. 2020, [Reviewed]

Improvement of Performance of Undershot Cross-Flow Water Turbines Based on Shock Loss Reduction
Yasuyuki Nishi; Kentaro Hatano; Takashi Okazaki; Yuichiro Yahagi; Terumi Inagaki, Lead
International Journal of Fluid Machinery and Systems, Jan. 2020, [Reviewed]

Study of the internal flow structure of an ultra-small axial flow hydraulic turbine
Yasuyuki Nishi; Tomoyuki Kobori; Nozomi Mori; Terumi Inagaki; Norio Kikuchi, Lead
Renewable Energy, Aug. 2019, [Reviewed]

A study of the flow field of an axial flow hydraulic turbine with a collection device in an open channel
Yasuyuki Nishi; Genki Sato; Daishi Shiohara; Terumi Inagaki; Norio Kikuchi, Lead
Renewable Energy, Jan. 2019, [Reviewed]

Performance Characteristics and Flow Field of Axial Flow Hydraulic Turbine in Shallow Open Channel
Yasuyuki Nishi; Genki Sato; Daishi Shiohara; Terumi Inagaki; Norio Kikuchi, Lead
International Journal of Fluid Machinery and Systems, Oct. 2018, [Reviewed]

Performance and Internal Flow of a Dental Air Turbine Handpiece
Yasuyuki Nishi; Hikaru Fushimi; Kazuo Shimomura; Takeshi Hasegawa, Lead, An air turbine handpiece is a dental abrasive device that rotates at high speed and uses compressed air as the driving force. It is characterized by its small size, light weight, and painless abrading due to its high-speed rotation, but its torque is small and noise level is high. Thus, to improve the performance of the air turbine handpiece, we conducted a performance test of an actual handpiece and a numerical analysis that modeled the whole handpiece
we also analyzed the internal flow of the handpiece. Results show that experimental and calculated values were consistent for a constant speed load method with the descending speed of 1 mm/min for torque and turbine output. When the tip of the blade was at the center of the nozzle, the torque was at its highest. This is likely because the jet from the nozzle entered the tip of the blade from a close distance that would not reduce the speed and exited along the blade., Hindawi Limited
International Journal of Rotating Machinery, 2018, [Reviewed]

Performance characteristics of axial flow hydraulic turbine with a collection device in free surface flow field
Yasuyuki Nishi; Genki Sato; Daishi Shiohara; Terumi Inagaki; Norio Kikuchi, Lead, We have developed an axial flow hydraulic turbine having a collection device that increases the output power by collecting the water flow and increasing its speed; however, in the flow field of this open channel-installed hydraulic turbine, the flow speed and water depth upstream change due to the resistance of the hydraulic turbine itself; also, the flow field contains a free surface that is highly complex. The purpose of this study is to reveal the performance characteristics of the hydraulic turbine in a free surface flow field. For this purpose, we performed a multiphase flow analysis that takes the performance characteristics and the free surface into account and a single-phase flow analysis that does not consider the free surface. It was found that the maximum power coefficient obtained by the multiphase flow analysis was significantly higher than that obtained by the single-phase flow analysis for the same reference flow speed. This was because, in free surface flow fields with low water depths, the collection device was not filled with water; moreover, despite no pressure recovery effect, the effect of the fall arising from the decrease in the backpressure coefficient was strong, significantly increasing the inlet velocity ratio. (C) 2017 Elsevier Ltd. All rights reserved., PERGAMON-ELSEVIER SCIENCE LTD
Renewable Energy, Nov. 2017, [Reviewed]

Study on Performance and Flow Field of an Undershot Cross-Flow Water Turbine Comprising Different Number of Blades
Yasuyuki Nishi; Kentaro Hatano; Terumi Inagaki, Lead, Recently, small hydroelectric generators have gained attention as a further development in water turbine technology for ultra low head drops in open channels. The authors have evaluated the application of cross-flow water turbines in open channels as an undershot type after removing the casings and guide vanes to substantially simplify these water turbines. However, because undershot cross-flow water turbines are designed on the basis of cross-flow water turbine runners used in typical pipelines, it remains unclear whether the number of blades has an effect on the performance or flow fields. Thus, in this research, experiments and numerical analyses are employed to study the performance and flow fields of undershot cross-flow water turbines with varying number of blades. The findings show that the turbine output and torque are lower, the fluctuation is significantly higher, and the turbine efficiency is higher for runners with 8 blades as opposed to those with 24 blades., SPRINGER
Journal of Thermal Science, Oct. 2017, [Reviewed]

Performance and Flow Field of a Gravitation Vortex Type Water Turbine
Yasuyuki Nishi; Terumi Inagaki, Lead, A gravitation vortex type water turbine, which mainly comprises a runner and a tank, generates electricity by introducing a flow of water into the tank and using the gravitation vortex generated when the water drains from the bottom of the tank. This water turbine is capable of generating electricity using a low head and a low flow rate with relatively simple structure. However, because its flow field has a free surface, this water turbine is extremely complicated, and thus its relevance to performance for the generation of electricity has not been clarified. This study aims to clarify the performance and flow field of a gravitation vortex type water turbine. We conducted experiments and numerical analysis, taking the free surface into consideration. As a result, the experimental and computational values of the torque, turbine output, turbine efficiency, and effective head agreed with one another. The performance of this water turbine can be predicted by this analysis. It has been shown that when the rotational speed increases at the runner inlet, the forward flow area expands. However, when the air area decreases, the backward flow area also expands., Hindawi Limited
International Journal of Rotating Machinery, 2017, [Reviewed]

下掛け式クロスフロー水車の羽根車近傍の流れに基づく性能分析
谷萩雄一朗; 西泰行; 岡﨑貴司; 稲垣照美,

Since the great east Japan earthquake in 2011, renewable energy is turned into importance. Hydro power is one of most important energies because it is not affected by weather condition and possible to generate steady quantity electric power, so it could be base load power. These days low head hydro power generation is going to increase, because it is easy to be set irrigation channel and agricultural waterway. We have developed water turbines appropriately for low head open channels to effectively utilize the hydro power energy. To improve the performance of the turbine, it is necessary to determine the free surface flow patterns around the turbine. We selected the undershot cross-flow water turbines which could apply to various sizes of channel and flow rate. Because we removed the turbine casing and guide vane, free surface flow patterns of the undershot cross-flow water turbine are very complex. We have researched free surface flow patterns around the turbines using both experiment and numerical analysis. We modified the apparatus system, and could measure mechanical friction loss of bearing. We introduced more precise computational grid of numerical analysis. So it was possible to specify more precise flow patterns near the runner. Time-averaged velocity distribution at inner or outer circumference of runner was almost consistent. As rotational speed increased, volume of cross-flow decreased and that of reversal flow increased. In generating torque and power of turbine, the most significant kind of flow was second stage cross-flow, and the most dominant component of flow was angular momentum. We estimated the torque and power of the turbine based on moment-of-momentum equation, and these results were consistent well with those of calculation.

, The Japan Society of Mechanical Engineers
日本機械学会論文集, Sep. 2016, [Reviewed]

Study on the Rotor Design Method for a Small Propeller-Type Wind Turbine
Yasuyuki Nishi; Yusuke Yamashita; Terumi Inagaki, Lead, Small propeller-type wind turbines have a low Reynolds number, limiting the number of usable airfoil materials. Thus, their design method is not sufficiently established, and their performance is often low. The ultimate goal of this research is to establish high-performance design guidelines and design methods for small propeller-type wind turbines. To that end, we designed two rotors: Rotor A, based on the rotor optimum design method from the blade element momentum theory, and Rotor B, in which the chord length of the tip is extended and the chord length distribution is linearized. We examined performance characteristics and flow fields of the two rotors through wind tunnel experiments and numerical analysis. Our results revealed that the maximum output tip speed ratio of Rotor B shifted lower than that of Rotor A, but the maximum output coefficient increased by approximately 38.7%. Rotors A and B experienced a large-scale separation on the hub side, which extended to the mean in Rotor A. This difference in separation had an impact on the significant decrease in Rotor A's output compared to the design value and the increase in Rotor B's output compared to Rotor A., SCIENCE PRESS
Journal of Thermal Science, Aug. 2016, [Reviewed]

Erratum: The Flow Field of Undershot Cross-Flow Water Turbines Based on PIV Measurements and Numerical Analysis
Yasuyuki Nishi; Terumi Inagaki; Yanrong Li; Ryota Omiya; Kentaro Hatano, Lead, Errors have been found in Vol. 7 (2014) No. 4 (October-December) pp. 174-182., Turbomachinery Society of Japan, Korean Fluid Machinery Association, Chinese Society of Engineering Thermophysics, IAHR
Internastional Journal of Fluid Machinery and Systems, Jan. 2016, [Reviewed]

Study on performance improvement of an axial flow hydraulic turbine with a collection device
Yasuyuki Nishi; Terumi Inagaki; Yanrong Li; Sou Hirama; Norio Kikuchi, Lead, The portable hydraulic turbine we previously developed for open channels comprises an axial flow runner with an appended collection device and a diffuser section. The output power of this hydraulic turbine was improved by catching and accelerating an open-channel water flow using the kinetic energy of the water. This study aimed to further improve the performance of the hydraulic turbine. Using numerical analysis, we examined the performances and flow fields of a single runner and a composite body consisting of the runner and collection device by varying the airfoil and number of blades. Consequently, the maximum values of input power coefficient of the Runner D composite body with two blades (which adopts the MEL031 airfoil and alters the blade angle) are equivalent to those of the composite body with two blades (MEL021 airfoil). We found that the Runner D composite body has the highest turbine efficiency and thus the largest power coefficient. Furthermore, the performance of the Runner D composite body calculated from the numerical analysis was verified experimentally in an open-channel water flow test., Turbomachinery Society of Japan
International Journal of Fluid Machinery and Systems, 01 Jan. 2016, [Reviewed]

The Design Method of Axial Flow Runners Focusing on Axial Flow Velocity Uniformization and Its Application to an Ultra-Small Axial Flow Hydraulic Turbine
Yasuyuki Nishi; Yutaka Kobayashi; Terumi Inagaki; Norio Kikuchi, Lead, We proposed a portable and ultra-small axial flow hydraulic turbine that can generate electric power comparatively easily using the low head of open channels such as existing pipe conduits or small rivers. In addition, we proposed a simple design method for axial flow runners in combination with the conventional one-dimensional design method and the design method of axial flow velocity uniformization, with the support of three-dimensional flow analysis. Applying our design method to the runner of an ultra-small axial flow hydraulic turbine, the performance and internal flow of the designed runner were investigated using CFD analysis and experiment (performance test and PIV measurement). As a result, the runners designed with our design method were significantly improved in turbine efficiency compared to the original runner. Specifically, in the experiment, a new design of the runner achieved a turbine efficiency of 0.768. This reason was that the axial component of absolute velocity of the new design of the runner was relatively uniform at the runner outlet in comparison with that of the original runner, and as a result, the negative rotational flow was improved. Thus, the validity of our design method has been verified., Hindawi Limited
International Journal of Rotating Machinery, 2016, [Reviewed]

Analysis of aerodynamic sound noise generated by a large-scaled wind turbine and its physiological evaluation
T. Inagaki; Y. Li; Y. Nishi, Last, Aerodynamic noise generated from a modern large-scale wind turbine was measured and analyzed from an engineering point of view. The measurement items were the sound, the sound pressure level (including the infrasound with extremely low-frequency band) and the corresponding physiological evaluation. Fifteen test subjects received various sound stimuli, including the recorded aerodynamic noise and a synthetic periodical sound, were examined with an electroencephalogram as a physiological evaluation. It was observed from the mapping patterns of brain waves that alpha (1) rhythm, which indicates a relaxed and concentrated state, after the sound stimulus with the frequency band of 20 Hz, showed the lowest value among the other cases. That is, the test subjects cannot keep relaxed and their concentration after hearing the sound stimulus at the frequency band of 20 Hz. The induced rate of alpha (1) rhythm almost decreased when the test subjects listened to all the sound stimuli, and further decreased with decreased frequency. Meanwhile, beta (1) rhythm, which shows a strain state, after the sound stimulus with the frequency band of 20 Hz, showed the highest value among the other cases. Therefore, the infrasound (e.g., low frequency and inaudible for human hearing) was considered to be an annoyance to the technicians who work in close proximity to a modern large-scale wind turbine., SPRINGER
International Journal of Environmental Science and Technology, Jun. 2015, [Reviewed]

Unsteady Flow Analysis of an Axial Flow Hydraulic Turbine with Collection Devices Comprising a Different Number of Blades
Yasuyuki Nishi; Terumi Inagaki; Yanrong Li; Sou Hirama; Norio Kikuchi, Lead, We previously devised a new type of portable hydraulic turbine that uses the kinetic energy of an open-channel flow to improve output power by catching and accelerating the flow. The turbine contains an axial flow runner with an appended collection device and a diffuser section that is not axisymmetric. The objective of this study is to determine how interference between the collection device and the runner influences performance characteristics of the turbine. We investigated the performance characteristics of the turbine and flow field for different numbers of blades during both unsteady and steady flow. During an unsteady flow, the maximum values of power coefficients for three and two blades increased by approximately 8.8% and 21.4%, respectively, compared to those during a steady flow. For the three-blade runner, the power coefficient showed small fluctuations, but for the two-blade runner, the power coefficient showed large fluctuations. These fluctuations in the power coefficient are attributed to fluctuations in the loading coefficient, which were generated by interference between the runner and the diffuser section of the collection device., SCIENCE PRESS
Journal of Thermal Science, Jun. 2015, [Reviewed]

Visualization study of flow-excited acoustic resonance in closed tandem side branches using high time-resolved particle image velocimetry
Y. Li; S. Someya; K. Okamoto; T. Inagaki and Y. Nishi, Last
Journal of Mechanical Science and Technology, Mar. 2015, [Reviewed]

Study on an Undershot Cross-Flow Water Turbine with Straight Blades
Yasuyuki Nishi; Terumi Inagaki; Yanrong Li; Kentaro Hatano, Lead, Small-scale hydroelectric power generation has recently attracted considerable attention. The authors previously proposed an undershot cross-flow water turbine with a very low head suitable for application to open channels. The water turbine was of a cross-flow type and could be used in open channels with the undershot method, remarkably simplifying its design by eliminating guide vanes and the casing. The water turbine was fitted with curved blades (such as the runners of a typical cross-flow water turbine) installed in tube channels. However, there was ambiguity as to how the blades' shape influenced the turbine's performance and flow field. To resolve this issue, the present study applies straight blades to an undershot cross-flow water turbine and examines the performance and flow field via experiments and numerical analyses. Results reveal that the output power and the turbine efficiency of the Straight Blades runner were greater than those of the Curved Blades runner regardless of the rotational speed. Compared with the Curved Blades runner, the output power and the turbine efficiency of the Straight Blades runner were improved by about 31.7% and about 67.1%, respectively., Hindawi Limited
International Journal of Rotating Machinery, 2015, [Reviewed]

Component analysis of unsteady hydrodynamic force of closed-type centrifugal pump with single blades of different blade outlet angles
Yasuyuki Nishi; Junichiro Fukutomi, Lead, Single-blade centrifugal impellers for sewage systems undergo both unsteady radial and axial thrusts. Therefore, it is extremely important for the improvement of pump reliability to quantitatively grasp these fluctuating hydrodynamic forces and determine the generation mechanism behind them. In this study, we conducted component analyses of radial and axial thrusts of closed, single-blade centrifugal pumps with different blade outlet angles by numerical analysis while considering leakage flow. The results revealed the effect of the blade outlet angle on the components of radial and axial thrusts. For increased flow rates, the time-averaged values of the pressure component were similar for all impellers, although its fluctuating components were higher for impellers with larger blade outlet angles. Moreover, the fluctuating inertia component of the impeller with a blade outlet angle of 8° decreased as the flow rate increased, whereas those with 16° and 24° angles increased. Therefore, the radial thrust on the hydraulic part was significantly higher for impellers with high blade outlet angles., Hindawi Publishing Corporation
International Journal of Rotating Machinery, 2015, [Reviewed]

Study on flow-induced acoustic resonance in symmetrically located side-branches using dynamic PIV technique
Y. Li; S. Someya; K. Okamoto; T. Inagaki and Y. Nishi, Last
Journal of Fluid Science and Technology, Jul. 2014, [Reviewed]

Study on the Flow Field of an Undershot Cross-flow Water Turbine
Yanrong Li; Yasuyuki Nishi; Terumi Inagaki; Kentarou Hatano, The purpose of this investigation is to research and develop a new type water turbine, which is appropriate for low-head open channel, in order to effectively utilize the unexploited hydropower energy of small river or agricultural waterway. The application of placing cross-flow runner into open channel as an undershot water turbine has been under consideration. As a result, a significant simplification was realized by removing the casings. However, flow field in the undershot cross-flow water turbine are complex movements with free surface. This means that the water depth around the runner changes with the variation in the rotation speed, and the flow field itself is complex and changing with time. Thus it is necessary to make clear the flow field around the water turbine with free surface, in order to improve the performance of this type turbine. In this research, the performance of the developed water turbine was determined and the flow field was visualized using particle image velocimetry (PIV) technique. The experimental results show that, the water depth between the outer and inner circumferences of the runner decreases as the rotation speed increases. In addition, the fixed-point velocities with different angles at the inlet and outlet regions of the first and second stages were extracted., TRANS TECH PUBLICATIONS LTD
Applied Mechanics and Materials, Jul. 2014

Study on an axial flow hydraulic turbine with collection device
Yasuyuki Nishi; Terumi Inagaki; Kaoru Okubo; Norio Kikuchi, Lead, We propose a new type of portable hydraulic turbine that uses the kinetic energy of flow in open channels. The turbine comprises a runner with an appended collection device that includes a diffuser section in an attempt to improve the output by catching and accelerating the flow. With such turbines, the performance of the collection device, and a composite body comprising the runner and collection device were studied using numerical analysis. Among four stand-alone collection devices, the inlet velocity ratio was most improved by the collection device featuring an inlet nozzle and brim. The inlet velocity ratio of the composite body was significantly lower than that of the stand-alone collection device, owing to the resistance of the runner itself, the decreased diffuser pressure recovery coefficient, and the increased backpressure coefficient. However, at the maximum output tip speed ratio, the inlet velocity ratio and the loading coefficient were approximately 31% and 22% higher, respectively, for the composite body than for the isolated runner. In particular, the input power coefficient significantly increased (by approximately 2.76 times) owing to the increase in the inlet velocity ratio. Verification tests were also conducted in a real canal to establish the actual effectiveness of the turbine., Hindawi Publishing Corporation
International Journal of Rotating Machinery, 18 May 2014, [Reviewed]

Study on an Undershot Cross-Flow Water Turbine
Yasuyuki Nishi; Terumi Inagaki; Yanrong Li; Ryota Omiya; Junichiro Fukutomi, Lead, This study aims to develop a water turbine suitable for ultra-low heads in open channels, with the end goal being the effective utilization of unutilized hydroelectric energy in agricultural water channels. We performed tests by applying a cross-flow runner to an open channel as an undershot water turbine while attempting to simplify the structure and eliminate the casing. We experimentally investigated the flow fields and performance of water turbines in states where the flow rate was constant for the undershot cross-flow water turbine mentioned above. In addition, we compared existing undershot water turbines with our undershot cross-flow water turbine after attaching a bottom plate to the runner. From the results, we were able to clarify the following. Although the effective head for cross-flow runners with no bottom plate was lower than those found in existing runners equipped with a bottom plate, the power output is greater in the high rotational speed range because of the high turbine efficiency. Also, the runner with no bottom plate differed from runners that had a bottom plate in that no water was being wound up by the blades or retained between the blades, and the former received twice the flow due to the flow-through effect. As a result, the turbine efficiency was greater for runners with no bottom plate in the full rotational speed range compared with that found in runners that had a bottom plate., SCIENCE PRESS
Journal of Thermal Science, May 2014, [Reviewed]

集水装置を有する軸流水車の性能に及ぼす羽根枚数の影響
西泰行; 稲垣照美; 大久保薫; 平間壮; 菊池伯夫, Lead, 日本工業出版
ターボ機械, Feb. 2014, [Reviewed]

Effect of blade outlet angle on unsteady hydrodynamic force of closed-type centrifugal pump with single blade
Yasuyuki Nishi; Junichiro Fukutomi, Lead, Geometrically, the single-blade centrifugal impeller, commonly used today as a sewage pump, is not axially symmetric. For this reason, the static pressure around the impeller fluctuates greatly when the impeller is rotating, and not only the radial thrust but also the axial thrust shows large fluctuations. Therefore, it is extremely important for the improvement of pump reliability to quantitatively grasp these fluctuating hydrodynamic forces. In this study, we investigated the unsteady hydrodynamic forces in a closed-type centrifugal pump with a single blade for different blade outlet angles using a numerical analysis that takes into account both experiment and the leakage flow. The results clearly showed the effect of the blade outlet angle on that act on the impeller. The root-mean-square value of the fluctuating component of the total radial thrust was roughly the same for whichever impeller at low flow rate, but at high flow rates, the value increased for impellers with larger blade outlet angles. Moreover, when the leakage flow rate increased with increasing static pressure around the impeller, such that the rear and front shroud parts were subject to high pressure, the absolute value of the axial thrust on both these parts increased., Hindawi Publishing Corporation
International Journal of Rotating Machinery, 2014, [Reviewed]

The flow field of undershot cross-flow water turbines based on PIV measurements and numerical analysis
Yasuyuki Nishi; Terumi Inagaki; Yanrong Li; Ryota Omiya; Kentaro Hatano, Lead, The ultimate objective of this study is to develop a water turbine appropriate for low-head open channels to effectively utilize the unused hydropower energy of rivers and agricultural waterways. The application of a cross-flow runner to open channels as an undershot water turbine has been considered and, to this end, a significant simplification was attained by removing the turbine casing. However, the flow field of an undershot cross-flow water turbine possesses free surfaces, and, as a result, the water depth around the runner changes with variation in the rotational speed such that the flow field itself is significantly altered. Thus, clear understanding of the flow fields observed with free surfaces to improve the performance of this turbine is necessary. In this study, the performance of this turbine and the flow field were evaluated through experiments and numerical analysis. The particle image velocimetry technique was used for flow measurements. The experimental results reflecting the performance of this turbine and the flow field were consistent with numerical analysis. In addition, the flow fields at the inlet and outlet regions at the first and second stages of this water turbine were clarified., Turbomachinery Society of Japan
International Journal of Fluid Machinery and Systems, 2014, [Reviewed]

小型ロケットエンジン用単段式ターボポンプの性能と内部流れ
西泰行; 塩幡宏規; 森作晃美; 宮城洋平; 野末辰裕, Lead, In the development of a turbopump for rocket engines, the cost is expensive and the period is too long. We apply the gas turbine of the turbocharger for cars of a consumer product to a turbine part, and propose the turbopump for small rocket engines which adopted as the pump part the single-stage turbopump which attained small size and simplification. The mixed-flow impeller, which is effective as the main impeller for suction performance, was used for this pump. Performance was optimized by carrying out ultra-high-speed rotation of the impeller. In this study, the pump performance, suction performance, and internal flow of two kinds of pumps with which blade angles differ were investigated by experiments and numerical analysis. The results showed that the head coefficient of impeller B was improved in comparison with that of impeller A at the design flow rate, thus satisfying the design requirement. However, the critical cavitation number of both impellers does not satisfy the design value. Since the channel is blockaded by a sheet cavity and the cloud cavity, the critical cavitation number of impeller B becomes larger than that of impeller A., Turbomachinery Society of Japan
ターボ機械, Jul. 2013, [Reviewed]

Study on instability characteristics of a mixed-flow pump of different blade loading distribution near the blade tip
Yasuyuki Nishi; Junichiro Fukutomi; Shunsuke Nakamura, Lead, Instability characteristics generated in a mixed-flow pump at a low flow rate adversely affect pump driving. This study investigates the internal flow and stall limit of two types of impellers of different blade loading distribution near the blade tip
in addition, it examines the mechanism by which the instability characteristics are generated. As a result, the following facts are clarified. Generally, the instability characteristics of the generating flow rate can be predicted using a diffusion factor and Taylor's pressure coefficient based on the results of numerical analysis. Wall stall is caused in both impellers, and the instability characteristics are generated by a reverse flow resulting from this wall stall. The instability characteristics of both impellers differ in the generating flow rate. Because it is easy to generate a wall stall in the impeller of aft loading, the instability characteristics generated at a high flow rate are significant. © 2013 The Japan Society of Mechanical Engineers.
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, May 2013, [Reviewed]

集水装置を有する軸流水車の開発に関する研究　　　　　　　　　　　　　　　
西泰行; 稲垣照美; 大久保薫; 菊池伯夫, Lead
ターボ機械, Apr. 2013, [Reviewed]

Performance and internal flow of an undershot-type cross-flow water turbine
Yasuyuki Nishi; Terumi Inagaki; Ryota Omiya; Junichiro Fukutomi, Lead, An undershot-type cross-flow water turbine does not require a casing for open channels and hence considerable simplification is attained. However, because this water turbine does not have a casing and has a free surface, it is believed that the internal flow considerably changes with the rotational speed. In this study, the performance and internal flow of the undershot-type cross-flow water turbine at a constant flow rate were investigated by an experiment and numerical analysis, and the following facts were clarified. The first-stage inlet area and the second-stage inlet and outlet areas are reduced with increase in rotational speed. Shock loss at the second- and first-stage areas is dominant in low- and high-rotational-speed regions, respectively. Moreover, shock loss has a considerable influence on the performance of this water turbine in low- and high-rotational-speed regions. ©2013 The Japan Society of Mechanical Engineers.
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Apr. 2013, [Reviewed]

下掛け式クロスフロー水車の内部流れに関する研究
西泰行; 稲垣照美; 近江谷亮太; 福富純一郎, Lead, 日本工業出版
ターボ機械, Jan. 2013, [Reviewed]

Component analysis of unsteady hydrodynamic force of closed-type centrifugal impeller with single-blade
Yasuyuki Nishi; Junichiro Fukutomi; Masami Sakai, Lead, Closed-type centrifugal impellers with single-blade are widely used as sewage pumps. However, they are geometrically asymmetric, thus resulting in significant changes in the circumferential static pressure distribution of the impeller as it rotate, which is believed to drastically change the radial and axial thrusts. To improve pump reliability, it is therefore necessary to quantitatively understand unsteady hydrodynamic forces, and to clarify the behavior and mechanism of generated hydrodynamic forces. This study investigates the radial and axial thrusts acting on a single-blade centrifugal impeller by component analysis. As a result, the behavior of the components of the radial and axial thrusts was clarified. In the time-averaged value of the radial thrust of the hydraulic part, the pressure component is dominant and the momentum component acts in a direction that offsets the pressure component. Although the momentum component is dominant in the time-averaged value of the axial thrust of the hydraulic part, it is mostly offset by the pressure component. © 2012 The Japan Society of Mechanical Engineers.
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Dec. 2012, [Reviewed]

Study on unsteady hydrodynamic force of closed-type centrifugal pump with single-blade
Yasuyuki Nishi; Junichiro Fukutomi; Masami Sakai, Lead, Single-blade centrifugal impellers widely used as sewage pumps are geometrically asymmetric. Therefore, circumferential static pressure distribution of an impeller changes considerably with its rotation, and is considered to drastically change radial and axial thrust. Therefore, to improve pump reliability, it is necessary to quantitatively understand unsteady hydrodynamic force and elucidate the behavior and mechanism of the thrust generated. This study investigates the radial and axial thrust acting on a single-blade centrifugal impeller by conducting experiments and CFD analysis. As a result, the behavior of the radial and axial thrust of the hydrodynamic force acting on rear shroud and front shroud surfaces was clarified. The axial thrust of the hydraulic part is the lowest, and those of the rear shroud and front shroud are dominant compared with their radial thrust. Increase in the axial thrust of the shrouds is due to the increase in the leakage flow rate with the increase in the circumferential static pressure distribution of the impeller. © 2012 The Japan Society of Mechanical Engineers.
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Apr. 2012, [Reviewed]

Radial Thrust of Single-Blade Centrifugal Pump
Y. Nishi; J. Fukutomi and R. Fujiwara, Lead, Single-blade centrifugal pumps are widely used as sewage pumps. However, the impeller of a single-blade pump is subjected to strong radial thrust during pump operation because of the geometrical axial asymmetry of the impeller. Therefore, to improve pump reliability, it is necessary to quantitatively understand radial thrust and elucidate the behavior and mechanism of thrust generating. This study investigates the radial thrust acting up on a single-blade centrifugal impeller by conducting experiments and CFD analysis. The results show that the fluctuating component of radial thrust increases as the flow rate deviates from the design flow rate to low or high value. Radial thrust was modeled by a combination of three components, inertia, momentum, and pressure by applying an unsteady conservation of momentum to the impeller. The sum of these components agrees with the radial thrust calculated by integrating the pressure and the shearing stress on the impeller surface. The behavior of each component was shown, and the effects of each component on radial thrust were clarified. The pressure component has the greatest effect on the time-averaged value and the fluctuating component of radial thrust. The time-averaged value of the inertia component is nearly 0, irrespective of the change in the flow rate. However, its fluctuating component has a magnitude nearly comparable with the pressure component at a low flow rate and slightly decreased with the increase in flow rate., Turbomachinery Society of Japan, Korean Fluid Machinery Association, Chinese Society of Engineering Thermophysics, IAHR
International Journal of Fluid Machinery and Systems, Dec. 2011, [Reviewed]

開水路に設置したクロスフロー水車に関する研究　　　　　　　　　　　　　　　
西泰行; 稲垣照美; 近江谷亮太; 立川力; 小寺正雄; 福富純一郎, Lead
ターボ機械, Aug. 2011, [Reviewed]

Improvement of instability characteristics in a mixed-flow pump based on flow near blade tip
Yasuyuki Nishi; Junichiro Fukutomi; Toru Shigemitsu; Satoru Higashide, Lead, Instability characteristics generated with partial flow rate in a mixed-flow pump have bad influence during the pump operation. This paper is described on the improvement of instability characteristics in a mixed-flow pump based on flow near blade tip. At first it was examined about the influence of the suction flow channel diameter which gave to performance and internal flow of mixed-flow pumps experimentally. Furthermore, it was examined about influence when it combined control of blade loading distributions near blade tip. As a result, pump efficiency fell at flow rate of the best efficiency a little when we reduced suction flow channel diameter. However, instability characteristics were improved so that a reverse flow developed at the impeller inlet tip side with the decrease of the flow rate slowly. In addition, about 82% head falls of instability characteristics were improved when we combined reduction of suction diameter and the impeller of aft-loading. © 2011 The Japan Society of Mechanical Engineers. © 2012 The Japan Society of Mechanical Engineers.
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Jul. 2011, [Reviewed]

座学／実学連結型学習プログラムにおける流体力学教材の開発と実践
西泰行; 稲垣照美; 小寺正雄, Lead, In this study, we have developed the fluid dynamics teaching materials in a learning program of connecting the lecture and the practical science based on the collaboration between industry and academia. Furthermore, we have practiced fluid dynamics education with these teaching materials and let students really experience the phenomenon of the fluid. As a result of questionnaires survey, many students thought that fluid dynamics was difficult at first. However, it was shown that the education with these teaching materials could let many students be interested in fluid dynamics., Japanese Society for Engineering Education
工学教育, Jul. 2011, [Reviewed]

Effect of the blade loading distribution near blade tip on internal flow and instability characteristics in a mixed-flow pump
Yasuyuki Nishi; Junichiro Fukutomi; Toru Shigemitsu; Satoru Higashide, Lead, Instability characteristics generated with partial flow rate in a mixed-flow pump have bad influence during the pump operation. In this paper, a method to control blade loading distributions of the mixed-flow pump by a simple and easy method is shown. This method was applied to control of the blade loading distribution of the blade tip in mixed-flow pumps. Furthermore, performance and the internal flow of these pumps were examined experimentally. As a result, head and pump efficiency fell at flow rate of the best efficiency in the impeller of aft-loading, but the instability characteristics were largely improved. In addition, a reverse flow suddenly developed at the impeller inlet tip side with the decrease of the flow rate in the impeller of fore-loading, but it was shown clearly that the reverse flow did not suddenly develop in the impeller of aft-loading. © 2011 The Japan Society of Mechanical Engineers.
Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Mar. 2011, [Reviewed]

らせん状吸込流路を有する一枚羽根遠心ポンプのラジアルスラストに及ぼす羽根出口幅の影響
西泰行; 福富純一郎, Lead, The sewage pumps are demanded a high pump efficiency and a performance in passing foreign bodies. The authors developed the new type impeller which balanced high efficiency and high passage performance so far. However, the impeller used by these usages demands the large passing particle size (minimum particle size in the pump). Therefore, it is very important by the design of these pumps to understand the influence that impeller outlet width gives to pump performance and a radial thrust. This study examined the influence that the impeller outlet width of singleblade centrifugal impeller with a helical spiral suction flow channel gave to pump performance and a radial thrust experimentally. As a result, if impeller outlet width becomes large, time averaged radial thrust decrease at low flow rate, but fluctuating component of radial thrust increase, and fluctuating component of radial thrust does not change at high flow rate, but time averaged radial thrust increase. Therefore, it was made clear that the maximum of the radial thrust did not almost change at all flow rates., Turbomachinery Society of Japan
ターボ機械, Jan. 2011, [Reviewed]

羽根出口角の異なる一枚羽根遠心ポンプの損失解析
西泰行; 藤原亮太; 福富純一郎, Lead, Single-blade centrifugal pump is used as a sewage pump widely. However, hydraulic losses increase because the impeller width is large as for single-blade centrifugal pump. It is extremely complicated, besides, because the internal flow of single-blade centrifugal pump changes greatly by an impeller position and changes by the flow rate. Therefore, a quantitative prediction and the elucidation of the generation mechanism of unsteady hydraulic losses are expected to make this kind of pump high efficiency. In this study, loss analysis was performed about two kinds of single-blade centrifugal impeller with different impeller outlet angle. As a result, the effect of the impeller outlet angle which gave it to performance and hydraulic losses was clarified. Furthermore, the momentary behavior of performance and hydraulic losses was shown, and their relations with the impeller inlet and outlet flow became clear., The Japan Society of Mechanical Engineers
日本機械学会論文集(B編), Jan. 2010, [Reviewed]

一枚羽根遠心ポンプのラジアルスラストに及ぼす羽根出口角の影響
西泰行; 藤原亮太; 福富純一郎, Lead, Single-blade centrifugal pump is widely used as a sewage pump. However, a single-blade is acted on by a large thrust during the pump operation because of the geometrical asymmetry of the impeller. Therefore when the reliability of the pump is secured, it is necessary to grasp a radial thrust quantitatively and elucidate the behavior and the dominant factors. This study investigated the radial thrust acting on two kinds of single-blade centrifugal impeller of different impeller outlet angle by an experiment and CFD analysis. Furthermore, as for the radial thrust to act on two kinds of impellers, the radial thrust was modeled by a combination of three components, unsteady, momentum and pressure components. As a result, the effect of the impeller outlet angle on the radial thrust and the each divided components was clarified., The Japan Society of Mechanical Engineers
日本機械学会論文集(B編), Dec. 2009, [Reviewed]

Design Method for Single-Blade Centrifugal Pump Impeller
Y. Nishi; R. Fujiwara and J. Fukutomi, Lead, The sewage pumps are demanded a high pump efficiency and a performance in passing foreign bodies. Therefore, the impeller used by these usages requires the large passed particle size (minimum particle size in the pump). However, because conventional design method of pump impeller results in small impeller exit width, it is difficult to be applied to the design of single-blade centrifugal pump impeller which is used as a sewage pump. This paper proposes a design method for single-blade centrifugal pump impeller. As a result, the head curve of the impeller designed by the proposed design method satisfied design specifications, and pump efficiency was over 62% more than conventional single-blade centrifugal pump impeller. By comparing design values with CFD analysis values, the suction velocity ratio of the design parameter agreed well with each other, but the relative velocity ratio did not agree due to the influence of the backflow of the impeller entrance., The Japan Society of Mechanical Engineers
Journal of Fluid Science and Technology, Dec. 2009, [Reviewed]

A Study of Performance and Internal Flow in a New Type of Sewage Pump
Y. Nishi and J. Fukutomi, Lead
International Journal of Fluid Machinery and Systems, Sep. 2009, [Reviewed]

A Study on Internal Flow in a New Type of Sewage Pump (1st Report, Comparison between Experiment and CFD Calculation)
Y. Nishi; N. Matsuo and J. Fukutomi, Lead, Sewage pumps are designed with a wide flow channel by, for example, sacrificing some efficiency and reducing the number of blades, in order to prevent plugging with foreign bodies. Authors have been proposing a new type of sewage pump impeller designed to further improve pump efficiency and performance in passing foreign bodies. This sewage pump impeller has a structure in which the suction flow channel of closed type non-clog pump is wound in a helical spiral. The focus of this research was to investigate internal flow in this single blade sewage pump impeller. The results clearly indicated the following facts. As a result of having compared experimental results by LDV with calculated results by CFD, there is the difference about the radial component of absolute velocity, but agrees about pump performance and the tangential component comparatively well. A flow to circulate through in the impeller again is accepted by an experiment, and the sign is accepted by CFD in a specific impeller position., The Japan Society of Mechanical Engineers
Journal of Fluid Science and Technology, Sep. 2009, [Reviewed]

A Study on Internal Flow in a New Type of Sewage Pump (2nd Report, Influence of Impeller Blade Loading and Volute Casing)
Y. Nishi; N. Matsuo and J. Fukutomi, Lead, Sewage pumps are designed with a wide flow channel by, for example, sacrificing some efficiency and reducing the number of blades, in order to prevent plugging with foreign bodies. Authors have been proposing a new type of sewage pump impeller designed to further improve pump efficiency and performance in passing foreign bodies. This sewage pump impeller has a structure in which the suction flow channel of closed type non-clog pump is wound in a helical spiral. The focus of this research was to investigate internal flow in this single blade sewage pump impeller by LDV measurement and CFD. As a result of having examined influence of impeller blade loading and volute casing, it clearly indicated the following facts. As well as influence of impeller blade middle loading and influence of the secondary flow, by increase of slip by influence of volute casing, static pressure and total pressure suddenly decrease together towards the end from impeller blade middle neighborhood., The Japan Society of Mechanical Engineers
Journal of Fluid Science and Technology, Sep. 2009, [Reviewed]

Loss Analysis of a New Type of Sewage Pump
Y. Nishi; N. Matsuo and J. Fukutomi, Lead, Authors have been proposing a new type of sewage pump impeller designed to further improve pump efficiency and performance in passing foreign bodies. And pump performance, internal flow and behavior of the radial thrust have been clarified by LDV measurement and CFD analysis. However, hydraulic design of pumps is integral calculus operation whereas flow analysis is differential calculus operation. Therefore, even if complicated internal flow was clarified by CFD analysis, it is difficult to improve pump performance if the cause and outbreak mechanism of each hydraulic loss were not clarified. This paper proposes loss analytical method of this pump equipped with a single blade impeller. As a result of having compared experimental values and CFD analysis values with loss analysis values about the head curve, they almost matched in a wide range of flow rates. When the flow flows backward to the impeller from the volute casing, the hydraulic loss becomes small in an appearance, but the power loss becomes excessive and the pump efficiency decreases., The Japan Society of Mechanical Engineers
Journal of Environment and Engineering, Sep. 2009, [Reviewed]

一枚羽根遠心ポンプのラジアルスラスト　　　　　　　　　　　　　　　
西泰行; 藤原亮太; 福富純一郎, Lead
日本機械学会論文集(B編), Aug. 2009, [Reviewed]

一枚羽根遠心羽根車の設計法に関する研究
西泰行; 藤原亮太; 福富純一郎, Lead, The sewage pump are demanded a high pump efficiency and a performance in passing foreign bodies. Therefore, the impeller used by these usages demands the large passing particle size (minimum particle size in the pump). However, because conventional design method of pump impeller calculates impeller exit width small, it is difficult to apply to single-blade centrifugal pump impeller which is used as a sewage pump. This paper proposes design method for single-blade centrifugal pump impeller. As a result, the head curve of the impeller by this design method satisfied a design point, and pump efficiency was over 62% more than conventional single-blade centrifugal pump impeller. Having compared design values and CFD analysis values, the suction velocity ratio of the design parameter accorded well, but the relative velocity ratio did not agree by the influence of the backflow of the impeller entrance., The Japan Society of Mechanical Engineers
日本機械学会論文集(B編), Jun. 2009, [Reviewed]

汚水用新型ポンプの損失解析
西泰行; 松尾信明; 福富純一郎, Lead
日本機械学会論文集(B編), Aug. 2008, [Reviewed]

汚水用新型ポンプの内部流れに関する研究(第2報，羽根負荷とボリュートケーシングの影響)
西泰行; 松尾信明; 福富純一郎, Lead
日本機械学会論文集(B編), Jul. 2008, [Reviewed]

汚水用新型ポンプの内部流れに関する研究(第1報，実験と数値解析の比較)
西泰行; 松尾信明; 福富純一郎, Lead
日本機械学会論文集(B編), Jun. 2008, [Reviewed]

汚水用新型ポンプに関する研究(内部流れとラジアルスラスト)　　　　　　　　　　　　　　　
西泰行; 牧田晃一; 福富純一郎, Lead
ターボ機械, Dec. 2006, [Reviewed]

汚水用新型ポンプに関する研究
西泰行; 牧田晃一; 福富純一郎, Lead
日本機械学会論文集(B編), Aug. 2006, [Reviewed]

開水路流れを利用する集水装置付き軸流水車の開発に関する研究　　　　　　　　　　　　　　　
西泰行
油空圧技術, Mar. 2021, [Invited]
Lead

Analysis of Free Surface Flow Patterns of Undershot Cross-Flow Water Turbines　　　　　　　　　　　　　　　
Y. Yahagi; Y. Nishi; T. Inagaki; Y. Li; K. Hatano and T. Okazaki
Proceedings of the 13th Asian International Conference on Fluid Machinery, 10 Sep. 2015, [Reviewed]

Research on the Flow Field of Undershot Cross-Flow Water Turbines Using Experiments and Numerical Analysis
Y. Nishi; T. Inagaki; Y. Li; R. Omiya and K. Hatano
Proceedings of the 27th IAHR Symposium on Hydraulic Machinery and Systems, Sep. 2014, [Reviewed]
Lead

Visualization study on the flow field of an undershot cross-flow water turbine using PIV technique　　　　　　　　　　　　　　　
Y. Li; Y. Nishi; T. Inagaki and K. Hatano
Proceedings of the 16th International Symposium on Flow Visualization, Jun. 2014, [Reviewed]

Radial and Axial Thrust of Closed-Type Centrifugal Pump with Single Blade　　　　　　　　　　　　　　　
Y. Nishi; J. Fukutomi and M. Sakai
Proceedings of the 12th Asian International Conference on Fluid Machinery, Sep. 2013, [Reviewed]
Lead

Effect of Blade Outlet Angle on Radial Thrust of Single-Blade Centrifugal Pump
Y. Nishi; J. Fukutomi and R. Fujiwara
Proceedings of the 26th IAHR Symposium on Hydraulic Machinery and Systems, Aug. 2012, [Reviewed]
Lead

Radial Thrust of Single-Blade Centrifugal Pump
Y. Nishi; J. Fukutomi and R. Fujiwara
Proceedings of ASME-JSME-KSME Joint Fluids Engineering Conference, Jul. 2011, [Reviewed]
Lead

高効率・高通過性汚水用ポンプについて(第2報)
西泰行; 福富純一郎
ターボ機械, Jan. 2009
Lead

高効率・高通過性汚水用ポンプについて(第1報)
西泰行; 福富純一郎
ターボ機械, Dec. 2008
Lead

A Study on a New Type Sewage Pump　　　　　　　　　　　　　　　
Y. Nishi; K. Makita and J. Fukutomi
Proceedings of the 8th Asian International Fluid Machinery Conference, Oct. 2005, [Reviewed]
Lead

新型汚水用水中ポンプの開発
西泰行; 竹部力
産業機械, Jul. 2005
Lead

旋回流型マイクロバブル発生装置の気液二相流解析　　　　　　　　　　　　　　　
大場 友裕; 西 泰行; 粉川 広行; 有吉 玄; 二川 正敏
日本機械学会2024年度茨城講演会, 30 Aug. 2024

新形式VTOLリフトファンの空力特性の多目的最適化　　　　　　　　　　　　　　　
福山 雅文; 西 泰行; 佐伯 尚文; 大橋 光太郎; 奥 隆夫
日本機械学会2024年度茨城講演会, 30 Aug. 2024

クローズド形一枚羽根遠心ポンプの最適化設計法に関する研究　　　　　　　　　　　　　　　
小野 哲史; 西 泰行; 今野 渓人
日本機械学会2024年度茨城講演会, 30 Aug. 2024

STUDY ON PERFORMANCE AND HYDRAULIC LOSSES OFCENTRIFUGAL PUMPS WITH IMPELLERS HAVING POROUSSTRUCTURE　　　　　　　　　　　　　　　
Takeshi Konishi; Yasuyuki Hirano; Yasuyuki Nishi
16th World Congress on Computational Mechanics and 4th Pan American Congress on Computational Mechanics, 22 Jul. 2024

一枚羽根ポンプ逆転水車の性能と内部流れに及ぼす羽根入口角の影響　　　　　　　　　　　　　　　
小野哲史,西泰行
日本機械学会2023年度茨城講演会, 18 Aug. 2023

多目的最適化手法による斜流ポンプの高性能化と不安定特性改善　　　　　　　　　　　　　　　
磯崎由人,山﨑稜平,西泰行,茂木洋,萩原隆司
日本機械学会2023年度茨城講演会, 18 Aug. 2023

放射環状流路を有する羽根車を搭載したポンプの水力損失とその損失発生メカニズム　　　　　　　　　　　　　　　
小西毅,平野康之,西泰行
日本流体力学会年会2022, 28 Sep. 2022

放射・環状流路羽根車を有する遠心式ポンプの内部流動と水力損失　　　　　　　　　　　　　　　
小西毅,平野康之,西泰行
日本機械学会2022年度年次大会, 14 Sep. 2022

多段斜流ポンプの設計と性能に関する研究　　　　　　　　　　　　　　　
山崎稜平,西泰行,茂木洋,萩原隆司
日本機械学会2022年度茨城講演会, 19 Aug. 2022

クローズド形一枚羽根遠心ポンプのキャビテーション特性と内部流れに及ぼす流量の影響　　　　　　　　　　　　　　　
今野渓人,西泰行,WANG CHUNQI
日本機械学会2022年度茨城講演会, 19 Aug. 2022

重力渦式水車の設計法に関する研究　　　　　　　　　　　　　　　
齋藤健太,西泰行,安藤遼汰,稲垣照美
日本機械学会2022年度茨城講演会, 19 Aug. 2022

旋回流型マイクロバブル発生装置の流動特性の多目的最適化　　　　　　　　　　　　　　　
内海優太,西泰行,粉川広行,二川正敏
日本機械学会2022年度茨城講演会, 19 Aug. 2022

クローズド形一枚羽根遠心ポンプのキャビテーション特性と羽根車内流れに関する研究　　　　　　　　　　　　　　　
WANG CHUNQI,西泰行
第99期日本機械学会流体工学部門講演会, 09 Nov. 2021

集水装置を有する軸流水車の羽根車および集水装置の多目的最適化　　　　　　　　　　　　　　　
WEE YI HONG,西泰行,古賀広理,稲垣照美
第99期日本機械学会流体工学部門講演会, 08 Nov. 2021

一枚羽根ポンプ逆転水車の内部流れ構造と損失に関する研究　　　　　　　　　　　　　　　
伊藤夏海,西泰行
日本機械学会2021年度年次大会, 06 Sep. 2021

開水路における集水装置を有する軸流水車の集水装置形状の4目的最適化による高出力・低軸推力化　　　　　　　　　　　　　　　
WEE YI HONG,西泰行,古賀広理,稲垣照美
日本機械学会2021年度茨城講演会, 19 Aug. 2021

クローズド形一枚羽根遠心ポンプにおける羽根車内流れ構造と水力損失に関する研究　　　　　　　　　　　　　　　
WANG CHUNQI,西泰行,野地崇寛
日本機械学会2021年度茨城講演会, 19 Aug. 2021

PIV計測と数値解析による一枚羽根ポンプ逆転水車の内部流れ　　　　　　　　　　　　　　　
伊藤夏海,西泰行
日本機械学会2021年度茨城講演会, 19 Aug. 2021

羽根入口角の異なる一枚羽根ポンプ逆転水車に作用するラジアルスラストの成分分析　　　　　　　　　　　　　　　
伊藤夏海,西泰行
第98期日本機械学会流体工学部門講演会, 11 Nov. 2020

渦巻タンクを有する重力渦式水車の性能と流れ場に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
安藤遼汰,西泰行,助森大地,稲垣照美
第98期日本機械学会流体工学部門講演会, 11 Nov. 2020

放射周状流路を有する遠心羽根車のポンプ性能と水力損失に関する研究　　　　　　　　　　　　　　　
小西毅,平野康之,西泰行
日本機械学会2020年度年次大会, 16 Sep. 2020

一枚羽根ポンプ逆転水車のラジアルスラストに及ぼす羽根入口角の影響　　　　　　　　　　　　　　　
伊藤夏海,西泰行
日本機械学会2020年度年次大会, 16 Sep. 2020

直線羽根を有する下掛け式クロスフロー水車の自由表面流れと性能に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
谷萩雄一朗; 西泰行; 進藤幹広; 鈴木亮太; 稲垣照美
日本機械学会2020年度年次大会, 16 Sep. 2020

渦巻タンクを有する重力渦式水車の性能と流れ場に及ぼす流量の影響　　　　　　　　　　　　　　　
安藤遼汰,西泰行,助森大地,稲垣照美
日本機械学会2020年度年次大会, 16 Sep. 2020

重力渦式水車の性能と水力損失に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
安藤遼汰,西泰行,助森大地,稲垣照美
日本機械学会2020年度茨城講演会, 21 Aug. 2020

一枚羽根ポンプ逆転水車のラジアルスラストの計測と数値解析　　　　　　　　　　　　　　　
伊藤夏海,西泰行
日本機械学会2020年度茨城講演会, 21 Aug. 2020

放射・周状流路を有する羽根車のポンプ性能に関する研究　　　　　　　　　　　　　　　
小西毅; 平野康之; 西泰行
日本機械学会2019年度年次大会, 10 Sep. 2019

オープン形一枚羽根遠心ポンプにおけるケーシング内の流れ構造に関する研究　　　　　　　　　　　　　　　
森章紘; 西泰行; 野地崇寛
日本機械学会2019年度茨城講演会, 22 Aug. 2019

集水装置を有する軸流水車の集水装置形状の多目的最適化　　　　　　　　　　　　　　　
古賀広理; 西泰行; 笹下紘利; 稲垣照美; 菊池伯夫
日本機械学会2019年度茨城講演会, 22 Aug. 2019

直線羽根を有する下掛け式クロスフロー水車の性能と流れ場に及ぼす羽根角度の影響　　　　　　　　　　　　　　　
進藤幹広; 西泰行; 谷萩雄一朗; 鈴木亮太; 稲垣照美
日本機械学会2019年度茨城講演会, 22 Aug. 2019

小型プロペラ形風車の空力騒音に関する研究　　　　　　　　　　　　　　　
川島卓也; 西泰行; 稲垣照美
日本機械学会2019年度茨城講演会, 22 Aug. 2019

薄型多翼ファンの騒音特性に関する研究　　　　　　　　　　　　　　　
古内薫; 西泰行
日本機械学会関東支部第25期総会・講演会, 19 Mar. 2019

一枚羽根ポンプ逆転水車のラジアルスラストに関する研究　　　　　　　　　　　　　　　
吉澤優介; 西泰行
日本機械学会関東支部第25期総会・講演会, 19 Mar. 2019

タンク形状が重力渦式水車の性能と流れ場に及ぼす影響　　　　　　　　　　　　　　　
助森大地; 西泰行; 稲垣照美
日本機械学会関東支部第25期総会・講演会, 19 Mar. 2019

曲線羽根を用いた下掛け水車の性能と流れ場に関する研究　　　　　　　　　　　　　　　
谷萩雄一朗; 西泰行; 鈴木亮太; 稲垣照美
第80回ターボ機械協会東北講演会, 12 Oct. 2018

重力渦式水車の流れ場と水力損失に及ぼす流量の影響　　　　　　　　　　　　　　　
助森大地; 西泰行; 鈴尾亮太; 稲垣照美
第80回ターボ機械協会東北講演会, 12 Oct. 2018

非設計点におけるクローズド形一枚羽根遠心ポンプのケーシング内の流れ構造　　　　　　　　　　　　　　　
野地崇寛; 西泰行
第80回ターボ機械協会東北講演会, 12 Oct. 2018

多孔質羽根車を用いた遠心ポンプの設計と性能予測　　　　　　　　　　　　　　　
小西毅; 平野康之; 西泰行
日本機械学会2018年度年次大会, 10 Sep. 2018

歯科用エアタービンの性能に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
伏見輝; 西泰行; 下村和男; 佐藤嶺至; 長谷川健嗣
日本機械学会2018年度茨城講演会, 22 Aug. 2018

クローズド形一枚羽根遠心ポンプにおけるケーシング内の流れ構造に関する研究　　　　　　　　　　　　　　　
野地崇寛; 西泰行
日本機械学会2018年度茨城講演会, 22 Aug. 2018

重力渦式水車の損失解析　　　　　　　　　　　　　　　
助森大地; 西泰行; 鈴尾亮太; 稲垣照美
日本機械学会2018年度茨城講演会, 22 Aug. 2018

集水装置を有する軸流水車の性能特性に及ぼす流量の影響　　　　　　　　　　　　　　　
笹下紘利; 西泰行; 塩原大史; 稲垣照美; 菊池伯夫
日本機械学会2018年度茨城講演会, 22 Aug. 2018

歯科用エアタービンのノズル形状の最適化　　　　　　　　　　　　　　　
伏見輝; 西泰行; 下村和男; 長谷川健嗣
日本機械学会関東支部第24期総会・講演会, 17 Mar. 2018

超小型軸流水車内の流れ構造に関する研究　　　　　　　　　　　　　　　
小堀智之; 西 泰行; 森 望美; 稲垣照美; 菊池伯夫
日本機械学会関東支部第24期総会・講演会, 17 Mar. 2018

クローズド形一枚羽根遠心ポンプの非定常内部流れに関する研究　　　　　　　　　　　　　　　
野地崇寛; 西泰行; 稲葉凱
日本機械学会関東支部第24期総会・講演会, 17 Mar. 2018

直線羽根を用いた下掛け式クロスフロー水車の性能分析　　　　　　　　　　　　　　　
鈴木亮太; 西泰行; 谷萩雄一朗; 岡﨑貴司; 稲垣照美
日本機械学会2017年度茨城講演会, 29 Aug. 2017

重力渦式水車の性能に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
鈴尾亮太; 西泰行; 稲垣照美
日本機械学会2017年度茨城講演会, 29 Aug. 2017

障害物を有する薄型多翼ファンの流れ場と性能に関する研究　　　　　　　　　　　　　　　
藤川寛文; 西泰行; 西村展一
日本機械学会2017年度茨城講演会, 29 Aug. 2017

歯科用エアタービンハンドピースの内部流れと性能に関する研究　　　　　　　　　　　　　　　
伏見輝; 西泰行; 下村和男; 長谷川健嗣
日本機械学会2017年度茨城講演会, 29 Aug. 2017

超小型軸流水車の最適化設計　　　　　　　　　　　　　　　
森望美; 西泰行; 小堀智之; 稲垣照美; 菊池伯夫
第77回ターボ機械協会総会講演会, 19 May 2017

PIV計測とCFDによるクローズド形一枚羽根遠心ポンプの内部流れ　　　　　　　　　　　　　　　
野地崇寛; 西泰行; 稲葉凱
第77回ターボ機械協会総会講演会, 19 May 2017

クローズド形一枚羽根遠心ポンプ内のキャビテーション流れの可視化　　　　　　　　　　　　　　　
稲葉凱; 西泰行
可視化情報全国講演会（日立2016）, 08 Oct. 2016

流量変化が重力渦式水車の流れ場に及ぼす影響　　　　　　　　　　　　　　　
鈴尾亮太; 西泰行; 稲垣照美
可視化情報全国講演会（日立2016）, 08 Oct. 2016

超小型軸流水車内の異物の挙動の可視化　　　　　　　　　　　　　　　
小堀智之; 西泰行; 小林泰; 稲垣照美; 菊池伯夫
可視化情報全国講演会（日立2016）, 08 Oct. 2016

流量変化時の下掛け式クロスフロー水車の流れ場　　　　　　　　　　　　　　　
岡﨑貴司; 西泰行; 谷萩雄一朗; 稲垣照美
可視化情報全国講演会（日立2016）, 08 Oct. 2016

自由表面流れ場における集水装置を有する軸流水車の後流特性　　　　　　　　　　　　　　　
佐藤元紀; 西泰行; 塩原大史; 稲垣照美; 菊池伯夫
可視化情報全国講演会（日立2016）, 08 Oct. 2016

集水装置を有する軸流水車の性能と流れ場に及ぼすつばの影響　　　　　　　　　　　　　　　
塩原大史; 西泰行; 佐藤元紀; 稲垣照美; 菊池伯夫
可視化情報全国講演会（日立2016）, 08 Oct. 2016

下掛け式クロスフロー水車の流量変化時の性能分析　　　　　　　　　　　　　　　
岡﨑貴司; 西泰行; 谷萩雄一朗; 稲垣照美
第76回ターボ機械協会北見講演会, 30 Sep. 2016

開水路における軸流水車の性能特性と流れ場　　　　　　　　　　　　　　　
佐藤元紀; 西泰行; 塩原大史; 稲垣照美; 菊池伯夫
第76回ターボ機械協会北見講演会, 30 Sep. 2016

下掛け式クロスフロー水車の性能解析　　　　　　　　　　　　　　　
岡﨑貴司; 西泰行; 谷萩雄一朗; 稲垣照美
第75回ターボ機械協会総会講演会, 20 May 2016

集水装置を有する軸流水車の自由表面流れ場における性能特性　　　　　　　　　　　　　　　
佐藤元紀; 西泰行; 稲垣照美; 塩原大史; 菊池伯夫
第75回ターボ機械協会総会講演会, 20 May 2016

重力渦式水車の性能に及ぼす流量の影響　　　　　　　　　　　　　　　
綿引宏之; 西泰行; 稲垣照美
日本機械学会関東支部第22期総会・講演会, 11 Mar. 2016

高度化手法による下掛け式クロスフロー水車の自由表面流れの解明　　　　　　　　　　　　　　　
谷萩雄一朗; 西泰行; 稲垣照美; 李艶栄; 秦野健太郎; 岡﨑貴司
第93期日本機械学会流体工学部門講演会, 08 Nov. 2015

衝突損失低減に着目した下掛け式クロスフロー水車の高性能化　　　　　　　　　　　　　　　
岡﨑貴司; 西泰行; 稲垣照美; 李艶栄; 谷萩雄一朗; 秦野健太郎
第93期日本機械学会流体工学部門講演会, 08 Nov. 2015

PIV計測と数値解析による集水装置を有する軸流水車の流れ場　　　　　　　　　　　　　　　
佐藤元紀; 西泰行; 稲垣照美; 李艶栄; 平間壮; 菊池伯夫
第93期日本機械学会流体工学部門講演会, 08 Nov. 2015

集水装置を有する軸流水車の自由表面を考慮した数値解析　　　　　　　　　　　　　　　
佐藤元紀; 西泰行; 稲垣照美; 李艶栄; 平間壮; 菊池伯夫
日本機械学会2015年度茨城講演会, 28 Aug. 2015

超小型軸流水車の軸流速度均一化に着目した設計法に関する研究　　　　　　　　　　　　　　　
小林泰; 西泰行; 稲垣照美; 李艶栄; 平間壮; 菊池伯夫
日本機械学会2015年度茨城講演会, 28 Aug. 2015

重力渦式水車の流れ場に関する研究　　　　　　　　　　　　　　　
種村知昭; 西泰行; 稲垣照美; 李艶栄; 尾畑宏
日本機械学会2015年度茨城講演会, 28 Aug. 2015

直線羽根を用いた下掛け式クロスフロー水車の性能に及ぼす羽根角度の影響　　　　　　　　　　　　　　　
岡﨑貴司; 西泰行; 稲垣照美; 李艶栄; 谷萩雄一朗; 秦野健太郎
日本機械学会2015年度茨城講演会, 28 Aug. 2015

重力渦式水車に関する研究　　　　　　　　　　　　　　　
西泰行; 稲垣照美; 李艶栄; 尾畑宏
第73回ターボ機械協会総会講演会, 08 May 2015

クローズド形一枚羽根遠心ポンプの異物通過性に関する研究　　　　　　　　　　　　　　　
尾崎成憲; 西泰行
日本機械学会関東支部第21期総会・講演会, 21 Mar. 2015

超小型軸流水車の設計と性能に関する研究　　　　　　　　　　　　　　　
小林泰; 西泰行; 稲垣照美; 李艶栄; 菊池伯夫
日本機械学会関東支部第21期総会・講演会, 21 Mar. 2015

小型プロペラ形風車の設計法に関する研究　　　　　　　　　　　　　　　
山下裕介; 西泰行; 稲垣照美; 李艶栄
第24回環境工学総合シンポジウム2014, 18 Nov. 2014

集水装置を有する軸流水車の自由表面流れ解析　　　　　　　　　　　　　　　
平間壮; 西泰行; 稲垣照美; 李艶栄; 菊池伯夫
第24回環境工学総合シンポジウム2014, 18 Nov. 2014

PIV計測と数値解析による下掛け式クロスフロー水車の流れ場　　　　　　　　　　　　　　　
秦野健太郎; 西泰行; 稲垣照美; 李艶栄; 近江谷亮太
第92期日本機械学会流体工学部門講演会, 25 Oct. 2014

集水装置を有する軸流水車に関する実験的研究　　　　　　　　　　　　　　　
平間壮; 西泰行; 稲垣照美; 李艶栄; 菊池伯夫
第92期日本機械学会流体工学部門講演会, 25 Oct. 2014

下掛け式クロスフロー水車の性能と流れ場に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
秦野健太郎; 西泰行; 稲垣照美; 李艶栄; 谷萩雄一朗
日本機械学会2014年度茨城講演会, 05 Sep. 2014

集水装置を有する軸流水車の非定常流れ解析　　　　　　　　　　　　　　　
平間壮; 大久保薫; 西泰行; 稲垣照美; 李艶栄; 菊池伯夫
日本機械学会2014年度茨城講演会, 05 Sep. 2014

下掛け式クロスフロー水車の性能に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
秦野健太郎; 西泰行; 稲垣照美; 李艶栄; 福富純一郎
日本機械学会関東支部第20期総会・講演会, 15 Mar. 2014

オープン形一枚羽根遠心ポンプの性能特性とラジアルスラスト　　　　　　　　　　　　　　　
村田薫; 西泰行; 福富純一郎
日本機械学会関東支部第20期総会・講演会, 15 Mar. 2014

クローズド形二枚羽根遠心ポンプの変動流体力に及ぼすケーシングスロート面積の影響　　　　　　　　　　　　　　　
手島誠矢; 福富純一郎; 重光亨; 西泰行
第91期日本機械学会流体工学部門講演会, 10 Nov. 2013

直線羽根を用いた下掛け式クロスフロー水車の性能に及ぼす流量の影響　　　　　　　　　　　　　　　
秦野健太郎; 西泰行; 稲垣照美; 近江谷亮太; 福富純一郎
第91期日本機械学会流体工学部門講演会, 09 Nov. 2013

PIVによる下掛け式クロスフロー水車周りの流れ場計測　　　　　　　　　　　　　　　
秦野健太郎; 西泰行; 李艶栄; 稲垣照美; 近江谷亮太; 福富純一郎
第70回ターボ機械協会信州講演会, 13 Sep. 2013

集水装置を有する軸流水車への逆テーパ形ブレードの適用　　　　　　　　　　　　　　　
大久保薫; 西泰行; 稲垣照美; 平間壮; 菊池伯夫
第70回ターボ機械協会信州講演会, 13 Sep. 2013

直線羽根を用いた下掛け式クロスフロー水車の性能と内部流れ　　　　　　　　　　　　　　　
秦野健太郎; 近江谷亮太; 西泰行; 稲垣照美; 福富純一郎
日本機械学会2013年度年次大会, 11 Sep. 2013

直線羽根を用いた下掛け式クロスフロー水車に関する研究　　　　　　　　　　　　　　　
秦野健太郎; 西泰行; 稲垣照美; 近江谷亮太; 福富純一郎
日本機械学会2013年度茨城講演会, 06 Sep. 2013

集水装置を有する軸流水車の性能に及ぼす羽根枚数の影響　　　　　　　　　　　　　　　
大久保薫; 西泰行; 稲垣照美; 平間壮; 菊池伯夫
日本機械学会2013年度茨城講演会, 06 Sep. 2013

集水装置を有する軸流水車の高性能化に関する研究　　　　　　　　　　　　　　　
平間壮; 西泰行; 稲垣照美; 大久保薫; 菊池伯夫
日本機械学会2013年度茨城講演会, 06 Sep. 2013

逆テーパ形ブレードを有する水平軸風車に関する研究　　　　　　　　　　　　　　　
山下裕介; 西泰行; 稲垣照美
日本機械学会2013年度茨城講演会, 06 Sep. 2013

クローズド形一枚羽根遠心ポンプの変動流体力に及ぼす羽根出口角の影響　　　　　　　　　　　　　　　
西泰行; 福富純一郎; 酒井將実
第69回ターボ機械協会総会講演会, 24 May 2013

下掛け式クロスフロー水車の内部流れに及ぼす流量の影響　　　　　　　　　　　　　　　
近江谷亮太; 西泰行; 稲垣照美; 福富純一郎
第90期日本機械学会流体工学部門講演会, 18 Nov. 2012

小型ロケットエンジン用単段式ターボポンプの性能と内部流れ　　　　　　　　　　　　　　　
西泰行; 塩幡宏規; 森作晃美; 宮城洋平; 野末辰裕
第68回ターボ機械協会沖縄講演会, 20 Sep. 2012

集水装置を備えた軸流水車の開発　　　　　　　　　　　　　　　
岩本浩信; 西泰行; 稲垣照美; 大久保薫; 菊池伯夫
日本機械学会2012年度年次大会, 11 Sep. 2012

汚水用遠心ポンプの変動流体力に関する研究　　　　　　　　　　　　　　　
手島誠矢; 福富純一郎; 重光亨; 西泰行
日本機械学会2012年度年次大会, 10 Sep. 2012

クローズド形一枚羽根遠心ポンプの変動流体力に及ぼすライナリング隙間の影響　　　　　　　　　　　　　　　
酒井將実; 西泰行; 福富純一郎
日本機械学会2012年度茨城講演会, 24 Aug. 2012

下掛け式クロスフロー水車の非設計点における内部流れ　　　　　　　　　　　　　　　
近江谷亮太; 西泰行; 稲垣照美; 福富純一郎
日本機械学会2012年度茨城講演会, 24 Aug. 2012

超高速・小型ターボポンプの性能と内部流れに関する研究　　　　　　　　　　　　　　　
森作晃美; 宮城洋平; 西泰行; 塩幡宏規; 野末辰裕
日本機械学会2012年度茨城講演会, 24 Aug. 2012

集水装置を有する軸流水車に関する研究　　　　　　　　　　　　　　　
大久保薫; 岩本浩信; 西泰行; 稲垣照美; 菊池伯夫
日本機械学会2012年度茨城講演会, 24 Aug. 2012

下掛け式クロスフロー水車の内部流れ　　　　　　　　　　　　　　　
西泰行; 稲垣照美; 近江谷亮太; 福富純一郎
第67回ターボ機械協会総会講演会, 25 May 2012

下掛け式クロスフロー水車の内部流れに関する研究　　　　　　　　　　　　　　　
近江谷亮太; 西泰行; 稲垣照美; 立川力; 小寺正雄; 福富純一郎
日本機械学会関東支部第18期総会講演会, 10 Mar. 2012

クローズド形一枚羽根遠心ポンプのアキシャルスラストに関する研究　　　　　　　　　　　　　　　
酒井將実; 西泰行; 福富純一郎
日本機械学会関東支部第18期総会講演会, 10 Mar. 2012

翼端羽根負荷分布の異なる斜流ポンプの不安定特性に関する研究　　　　　　　　　　　　　　　
中村俊介; 西泰行; 福富純一郎; 重光亨; 東出暁
日本機械学会関東支部第18期総会講演会, 10 Mar. 2012

開水路用超低落差水車に関する研究　　　　　　　　　　　　　　　
近江谷亮太; 西泰行; 稲垣照美; 立川力; 小寺正雄; 福富純一郎
日本機械学会2011年度茨城講演会, 26 Aug. 2011

クローズド形一枚羽根遠心ポンプの変動流体力に関する研究　　　　　　　　　　　　　　　
酒井將実; 西泰行; 福富純一郎
日本機械学会2011年度茨城講演会, 26 Aug. 2011

開水路に設置したクロスフロー水車に関する研究　　　　　　　　　　　　　　　
西泰行; 稲垣照美; 近江谷亮太; 立川力; 小寺正雄; 福富純一郎
第65回ターボ機械協会総会講演会, 20 May 2011

翼先端流れに着目した斜流ポンプの不安定特性改善に関する研究　　　　　　　　　　　　　　　
東出暁; 福富純一郎; 重光亨; 西泰行
日本機械学会中国四国支部第49期総会・講演会, 05 Mar. 2011

高比速度斜流ポンプにおける不安定特性の抑制に関する研究について　　　　　　　　　　　　　　　
東出暁; 福富純一郎; 重光亨; 西泰行
日本機械学会中国四国支部・九州支部合同企画徳島講演会, 16 Oct. 2010

一枚羽根遠心ポンプのラジアルスラストに及ぼす羽根出口角の影響　　　　　　　　　　　　　　　
西泰行; 藤原亮太; 堀田義圭; 福富純一郎; 重光亨
第87期日本機械学会流体工学部門講演会, 07 Nov. 2009

一枚羽根遠心ポンプのラジアルスラストに関する研究　　　　　　　　　　　　　　　
堀田義圭; 藤原亮太; 西泰行; 福富純一郎; 重光亨
日本機械学会2009年度年次大会, 16 Sep. 2009

高比速度斜流ポンプに関する研究　　　　　　　　　　　　　　　
岩佐浩行; 福富純一郎; 重光亨; 西泰行
日本機械学会中四国支部第47期総会・講演会, 06 Mar. 2009

一枚羽根遠心羽根車の設計法に関する研究　　　　　　　　　　　　　　　
藤原亮太; 西泰行; 福富純一郎; 重光亨
日本機械学会2008年度年次大会, 05 Aug. 2008

クローズド形一枚羽根遠心羽根車のポンプ性能に及ぼす比速度の影響　　　　　　　　　　　　　　　
舩坂新; 西泰行; 榎本純也; 安藤昭宏
日本機械学会2008年度年次大会, 05 Aug. 2008

汚水用新型ポンプの損失解析　　　　　　　　　　　　　　　
西泰行; 福富純一郎; 松尾信明; 藤原亮太; 重光亨
第59回ターボ機械協会総会講演会, 16 May 2008

汚水用新型ポンプの内部流れに関する研究　　　　　　　　　　　　　　　
西泰行; 福富純一郎; 松尾信明; 藤原亮太; 重光亨
日本機械学会2007年度年次大会, 10 Sep. 2007

汚水用新型ポンプに関する研究（内部流れとラジアルスラスト）　　　　　　　　　　　　　　　
西泰行; 牧田晃一; 福富純一郎
第84期日本機械学会流体工学部門講演会, 29 Oct. 2006

汚水用新型ポンプに関する研究　　　　　　　　　　　　　　　
西泰行; 牧田晃一; 福富純一郎
第83期日本機械学会流体工学部門講演会, 29 Oct. 2005

汚水用新型ポンプに関する研究　　　　　　　　　　　　　　　
西泰行; 牧田晃一; 福富純一郎
日本機械学会2005年度年次大会, 22 Sep. 2005

新型汚水用水中ポンプの開発　　　　　　　　　　　　　　　
西泰行; 竹部力; 玉置陽一; 安藤昭宏; 舩坂新
第42回下水道研究発表会, Jul. 2005

中空流路を有する三杯形風車の開発に関する研究　　　　　　　　　　　　　　　
中瀬敬之; 西泰行; 中島俊介; 松本鉄太郎
日本機械学会2001年度年次大会, Aug. 2001

2013, 可視化情報学会

2012, 日本ガスタービン学会

2011, 日本風力エネルギー学会

2003, ターボ機械協会

2001, 日本機械学会