Education background

1997.09-2001.07, School of Mechanical and Automotive Engineering, HeFei University of Technology, B.E.;

2001.09-2006.07, College of Electrical Engineering, South China University of Technology, M.E＋Ph.D.

2008.01-2010.03, Department of Thermal Engineering, Tsinghua University, Post-Doc.

2010.08-2011.06, Department of Energy Science, Lund University, Post-Doc.

Experience

2006.07-2007.12, College of Electrical Engineering, South China University of Technology, Lector;

2010.04-2014.11, Department of Thermal Engineering, Tsinghua University, Lector;

2014.12- now, Department of Energy and Power Engineering, Tsinghua University, Associate Professor; PhD Tutor(2015).

Concurrent Academic

Member of the Standardization Technical Committee for Small Hydropower Units in the Energy Industry from 2011 to present; Editor of "Journal of Hydroelectric Engineering";

Reviewer of International journals “Energy”, “Renewable Energy”, etc.

Areas of Research Interests/ Research Projects

Analysis and prediction of flow mechanism and multiphase flow for hydraulic machinery:

1) Pelton turbine Flow mechanism and flow interference;

2) Dynamic Theory analysis and Optimum hydraulic Design of Fluid Machinery System;

3) Safe and Stability analysis of the Pumped Storage Unit;

4) High-pressure residual energy utilization and energy saving;

5) New Fluid Machinery R&D of Ocean Energy.

Research Status

Projects in research

1. Dongfang Electric Motor Ltd, hydraulic scheme design of Pelton turbine, calculation and analysis of sediment abrasion characteristics, host;

2. Research project, optimization and sample pump development of SK type corrosion-resistant and abrasion -resistant pulp pump hydraulic, host;

3. Shanghai Kaiquan Pump Industry (Group) Ltd, hydraulic performance research project of the vane pump, host;

5. Ministry of Industry and Information Technology of the People’s Republic of China: Green Manufacturing System Integration Project- Green Design Platform Construction Project of Plateau Turbine, the backbone;

6. Ministry of Industry and Information Technology of the People’s Republic of China: Green Manufacturing System Integration Project- Green Design Platform Construction Project of High-Efficiency Multiphase Slurry  Transport Pump, the backbone.

Completed research projects

7. Research project, research and development of the automatic test system of key fluid equipment of seawater desalination, host;

8. Research project, research and development of self-pressurized energy recovery test platform, host;

9. Three Gorges Group Survey, Design and Research Institute Ltd in Shanghai, research on turbine selection and anti-sediment measures of high-head and muddy power stations, host;

10. The subject of Tianjin's key research and development program, research on water dynamics coupling characteristics of high-speed turbine pumps for seawater desalination, host;

11. NKRDPC, 2017YFC0404202, Research and product development of key technology of a seawater desalination pump and energy recovery, project leader;.

12. Ministry of Industry and Information Technology of the People’s Republic of China: Green Manufacturing System Integration Project-Green Design Platform Construction Project for High-efficiency Hydropower Equipment, the backbone;

13. NSFC, 51479093, Analysis of Pelton turbine flow interference characteristic and the relation with scale effect, host.

14. NSFC Key,51439002, Flow instability mechanism and the control in centrifugal pumps, the second director.

15. NSFC for international conference，51310305048，the 6th International Conference on Pumps and Fans, host.

16. NSFC Young, 51009077, Numerical analysis of 3-D unsteady flow characteristic for pump-turbine with misaligned guide vanes during start-up, host.

17. Renewable energy project from State Oceanic Administration, GHME2012GC02, Efficiency Revamping of Unit 1# in Jiangxia Tidal Power Station and Research on New Bidirectional Tidal Turbine, major participant.

18. Research project, development of software system of water power machine test measurement, host;

19. Research project, research, development and scheme design of the deep-sea oil-water-gas three-phase mixed transportation pump, host.

20. Research project, runner crack analysis and new runner design, host.

Honors And Awards

1.  Research and application of design, manufacturing and engineering demonstration construction of a new three-blade tidal generator set, Marine Science Engineering Innovation Award, Second Prize, 2019.

2. Research on the Key Technology of fluid-structure interaction characteristics in hydraulic machinery, Dayu Water Conservancy Science and Technology Award, Second prize, 3/22, 2014;

3. Flow analysis and optimal design for hydraulic machinery based on vortex dynamic theory, the the Ministry of Education Science and Technology Progress Award, Second prize, 3/8, 2013;

4. Research on the Key Technology of Bulb Turbine Transient Performance and Fatigue Life, Dayu Water Conservancy Science and Technology Award, Second prize, 4/12, 2012;

5. Study on Key Technologies to Enhance the Operation Stability of Modern Power System, the Ministry of Education Science and Technology Progress Award, Second prize, 12/22, 2011;

6. The hydraulic design of a medium-sized reverse osmosis and energy recovery integrated machine for seawater desalination, the 13th National Undergraduate Social Practice and Technological Competition for Energy Conservation and Emission Reduction, First prize, 2020 (adviser).

7. Bidirectional six-condition rim-generator low-head tubular hydro turbine，the 8th National Undergraduate Social Practice and Technological Competition for Energy Conservation and Emission Reduction, First prize, 2015 (adviser);

8. Excellent advisor of 2020 Tsinghua University SRT Plan, Second prize;

9. "Fundamentals of Fluid Machinery" teaching software, Tsinghua University Excellent Teaching Software Competition, First prize, 2/3, 2012.

10. Excellent advisor of 2015 Tsinghua University SRT Plan, First prize;

Academic Achievement

1. Journal papers in recent years

[1] Bao Guo, Yexiang Xiao*, Anant Kumar Rai, Quanwei Liang, Jie Liu. Analysis of the air-water-sediment flow behavior in Pelton buckets using a Eulerian-Lagrangian approach [J]. Energy. 2021.218, 119522. SCI, EI.

[2] Bao Guo, Yexiang Xiao*, Anant Kumar Rai, Jin Zhang, Quanwei Liang. Sediment-laden flow and erosion modeling in a Pelton turbine injector[J]. Renewable Energy. 2020.162, pp. 30-42. SCI: OT3OY. EI.

[3] Anant Kumar Rai, Arun Kumar, Thomas Staubli and Xiao Yexiang*. Interpretation and application of the hydro-abrasive erosion model from IEC 62364 (2013) for Pelton turbines. Renewable Energy. 2020, 160: 396-408. SCI, EI.

[4] LIU Zishi, Yexiang Xiao*, WANG Chengpeng, ZHU Yilin, LIU Sihan, CUI Yongkang, YIN Xilong. Hydraulic performance analysis of reverse osmosis seawater desalination turbo energy recovery device[J]. Journal of Hydroelectric Engineering. 2021, 40(2), 131-140.

[5] Guangtai Shi, Zongku Liu,Yexiang Xiao*, Hong Yang, Helin Li, Xiaobing Liu. Effect of the inlet gas void fraction on the tip leakage vortex in a multiphase pump. Renewable Energy. 2020.150, pp. 46-57. SCI, EI

[6] Guangtai Shi, Zongku Liu, Yexiang Xiao*, Helin Li, Xiaobing Liu. Tip leakage vortex trajectory and dynamics in a multiphase pump at off-design condition. Renewable Energy. 2020.150, pp. 703-711.  SCI, EI

[7] Guangtai Shi, Zongku Liu, Yexiang Xiao*, Zhengwei Wang, Yongyao Luo, Kun Luo . Energy conversion characteristics of multiphase pump impeller analyzed based on blade load spectra [J]. Renewable Energy. 2020.157, pp. 9-23. SCI, EI

[8] Guangtai Shi, Zongku Liu, Yexiang Xiao*, Helin Li, Xiaobing Liu. Velocity characteristics in a multiphase pump under different tip clearances. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy. 2020, https://doi.org/10.1177/0957650920946533. SCI, EI.

[9] Luo Yongyao, Alexandre Presas ,Wang Zhengwei, Yexiang Xiao, Haoping Wang, Xiaoyi Jiang. Operating conditions leading to crack propagation in turbine blades of tidal barrages. Influence of head and operating mode. Engineering Failure Analysis. 2020, 108: 104254. SCI, EI.

[10] LI Yanhao, Bao GUO, Yexiang Xiao*.Numerical study of hydro-abrasive erosion in high-head Francis turbine runner [J].Journal of Hydroelectric Engineering. 2020, 39(2): 112-120.

[11] WANG Yan, GE Yunlu, HUANG Guoqing, HU Qiong, Yexiang Xiao*, HU Peng. The Logic Relationship between Macroscopic Characteristicsand Mesoscopic Velocity Field of High-Speed Rotating Flow Field of Dry Gas Seal [J].Tribology. 2020, 40(3): 364-377. EI:

[12] Yexiang Xiao, Bao Guo, Soo-Hwang Ahn, Yongyao Luo, Zhengwei Wang, Guangtai Shi and Yanhao Li. Slurry Flow and Erosion Prediction in a Centrifugal Pump after Long-Term Operation. Energies. 2019, 12(8), 1523. SCI, EI.

[13] Ahn, Soo-Hwang; Xiao, Yexiang; Wang, Zhengwei; Luo, Hongying; Luo, Yongyao. Numerical estimation of air core length in two-phase free surface vortex. Journal of Hydraulic Research. 2019, 57(4): 475-487. SCI, EI.

[14] Zhao, Xiaoran; Wang, Zhengwei; Xiao, Yexiang; Luo, Yongyao. Thermodynamic analysis of energy dissipation and unsteady flow characteristic in a centrifugal dredge pump under over-load conditions. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 2019, 233(13): 4742-4753. SCI, EI

[15] Xiaoran Zhao, Yongyao Luo, Zhengwei Wang, Yexiang Xiao and François Avellan. Unsteady Flow Numerical Simulations on Internal Energy Dissipation for a Low-Head Centrifugal Pump at Part-Load Operating Conditions. Energies.  2019, 12(10):2013. SCI, EI

[16] WANG Yan, HU Qiong, XIAO Yexiang, HUANG Guoqing, ZHU Yanhui, GE Yunlu. Turbulence effect and suppression mechanism of dry gas seal at ultra-high speeds [J]. Acta Aeronautica et Astronautica Sinica. 2019. EIP: 20194807736014.EI

[17] GUI Zhonghua, XIAO Yexiang. Overview of Hydraulic Stability of Pumped Storage Units in Unsteady-state [J] Hydropower and Pumped Storage. 2019,5(3): 98-101.

[18] GUI Zhonghua, GUO Xudong, OUYANG Jinhui, XIAO Yexiang. Study on Pressure Pulsation Improvement of Vaneless Zone of Pumped Storage Units and Vibration Reduction of Pumped Storage Power Plant [J].Hydropower and Pumped Storage. 2019,27(5): 75-77.

[19] Xiao Yexiang, Zhu Wei, Wang Zhengwei*, Zhang Jin, Soohwang Ahn, Zeng Congji, Luo Yongyao. Numerical analysis of how misaligned guide vanes improve the pump-turbine S-shaped characteristics for the turbine mode. Journal of Fluids Engineering-TRANSACTIONS OF THE ASME. 2018, 140(3), 031102,1-10. SCI, EI

[20] ZHAO Xiaoran, Yexiang Xiao, Wang Z.hengwei, Luo Yongyao, Cao lei. Unsteady Flow and Pressure Pulsation Characteristics Analysis of Rotating Stall in Centrifugal Pumps under Off Design Conditions. Journal of Fluids Engineering-TRANSACTIONS OF THE ASME. 2018, 140(2): 021105, 1-7. SCI, EI

[21] Zhao Xiaoran, Xiao Yexiang, Wang Zhengwei, Luo Hongying, Ahn Soo-Hwang, Yao Yangyang, Fan Honggang. Numerical analysis of non-axisymmetric flow characteristic for a pump-turbine impeller at pump off-design condition. Renewable Energy. 2018.115, pp. 1075-1085. SCI, EI

[22] Zeng Chongji, Xiao Yexiang, Luo Yongyao, Zhang Jin, Wang Zhengwei*, Fan Honggang, Ahn Soo-hwang. Hydraulic performance prediction of a prototype four-nozzle Pelton turbine by entire flow path simulation. Renewable Energy. 2018.125, pp. 270-282. SCI, EI

[23] Ahn, Soo-Hwang; Xiao, Yexiang; Wang, Zhengwei; Luo Yongyao, Fan Honggang. Unsteady prediction of cavitating flow around a three dimensional hydrofoil by using a modified RNG k-epsilon model. Ocean Engineering. 2018, 158: 275-285. SCI, EI

[24] LE Zhenchun, XIAO Yexiang, GUI Zhonghua, ZENG Congji, ZHU Wei. Unsteady flow and pressure pulse analysis of a Francis pump-turbine on reverse pump zone with small guide vane opening [J]. Journal of Hydraulic Engineering. 2018, 49(12):1541-1549. EI.

[25] Soohwang Ahn, Yexiang Xiao, Zhengwei Wang, Yongyao Luo. Numerical prediction on the effect of free surface vortex on intake flow characteristics for tidal power station. Renewable Energy. 2017.101, pp. 617-628. SCI, EI

[26] Zhai Liming, Luo Yongyao,Wang Zhengwe, Liu Xin, Xiao Yexiang . A review on the large tilting pad thrust bearings in the hydropower units. RENEWABLE & SUSTAINABLE ENERGY REVIEWS.2017,69, pp.1182-1198. SCI, EI

[27] Zeng Chongji, Xiao Yexiang, Wang Zhengwei, Zhang Jin, Luo Yongyao. Numerical analysis of a Pelton bucket free surface sheet flow and dynamic performance affected by operating head. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy. 2017.231.3: 182-196. SCI, EI

[28] Ahn Soo-Hwang, Xiao Yexiang, Wang Zhengwei*, Zhou Xuezhi, Luo Yongyao. Performance prediction of a prototype tidal power turbine by using a suitable numerical model. Renewable Energy. 2017.113, pp. 293-302. SCI, EI

[29] Cao Lei, Xiao Yexiang, Wang Zhengwei, Luo Yongyao. Pressure fluctuation characteristics in the sidewall gaps of a centrifugal pump. Engineering Computations, 2017,34(4):1034-1053. SCI, EI

[30] Liming Zhai, Yongyao Luo, Xin Liu, Funan Chen, Yexiang Xiao, Zhengwei Wang. Numerical simulations for the fluid-thermal-structural interaction lubrication in a tilting pad thrust bearing. Engineering Computations, 2017,34(4): 1149-1165. SCI, EI

[31] Luo Yongyao, Wang Zhengwei, Xiao Yexiang, He Chenglian. Optimization of the Runner for Extremely Low Head Bidirectional Tidal Bulb Turbine. ENERGIES. 2017.10(6): SCI, EI.  

[32] Xiao Yexiang, Zhu Wei, Wang Zhengwei*, Zhang Jin, Luo Yongyao, Zeng Chongji, Yao Yangyang. Analysis of the internal flow behavior on S-shaped region of a Francis pump turbine on turbine mode. Engineering Computations. 2016, 33(2): 543-561. SCI, EI

[33] Xiao Yexiang, Yao Yangyang, Wang Zhengwei*, Zhang Jin, Luo Yongyao, Zeng Chongji, Zhu Wei Hydrodynamic Mechanism Analysis of the Pump Hump District for a Pump-turbine. Engineering Computations. 2016, 33(3):957-976. SCI, EI

[34] Cao Lei, Wang Zhengwei, Xiao Yexiang, Luo Yongyao. Numerical investigation of pressure fluctuation characteristics in a shrouded centrifugal pump with changing axial clearance. International Journal of Rotating Machinery. 2016, 9306314. SCI, EI

[35] SUN Hui, XIAO Ruofu, WANG Fujun, XIAO Yexiang, and LIU Weichao . Analysis of the Pump-turbine S Characteristics Using the Detached Eddy Simulation Method. Chinese Journal of Mechanical Engineering (English Edition), 28(1), pp 115-122, 2015. SCI, EI.

[36] Cao Lei, Zhang Yiyang, Wang Zhengwei, Xiao Yexiang, Liu Changjun. Effect of axial clearance on the energy performance of an enclosed-impeller centrifugal pump with vice blades. Journal of Fluids Engineering. 2015;137(7):071101-071101-10. SCI, EI

[37] XIAO Yexiang, WANG Zhengwei, ZENG Jidi, ZHENG Jintai, LIN Jiayang，ZHANG Lanjin. Prototype and Numerical Studies of Interference Characteristics of Two Ski-Jump Jets from Opening Spillway Gates. Engineering Computations, 2015, 32(2):289-307. SCI, EI

[38] Luo Yongyao, Wang Zhengwei, Liu Xin, Xiao Yexiang, Chen Changkun, Wang Haopin, Yan Jianhua. Numerical prediction of pressure pulsation for a low head bidirectional tidal bulb turbine. Energy. 2015, 89: 730–738. SCI, EI

[39] Yang Lingbo, Xiao Yexiang, Tang Bing, Wang Zhengwei. Prediction of pulp pump erosion characteristic based on solid-liquid two-phase turbulent flow [J]. Journal of Drainage and Irrigation Machinery Engineering, 2015, 28(2): 98-103+127. CSCD:5396972

[40] Zeng Chongji, Xiao Yexiang, Zhang Jin, An Shouhuang, Wang Zhengwei. Numerical analysis of pelton turbine needle erosion characteristics [J]. Journal of Drainage and Irrigation Machinery Engineering, 2015,33(5): 407-411. CSCD:5453976

[41] ZHU Wei, XIAO Yexiang, YAO Yangyang, LUO yongyao, ZENG Chongji, WANG Zhengwei. Internal flow behaviour analysis of Francis pump-turbine in S-curve region with small guide vane opening [J]. Journal of Hydroelectric Engineering. 2015,34(10): 138-144.