Analysis of Rotor-Stator Interaction of a Pump-Turbine with Splitter Blades in a Pump Mode

Haiqin Song, Jinfeng Zhang, Ping Huang, Haikun Cai, Puyu Cao and Bo Hu
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Haiqin Song: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Jinfeng Zhang: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Ping Huang: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Haikun Cai: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Puyu Cao: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Bo Hu: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Mathematics, 2020, vol. 8, issue 9, 1-24

Abstract: The pump-turbine is the core component of a pumped storage power station. This paper considers an in-depth analysis of the rotor-stator interaction characteristics under computational fluid dynamics (CFD) and experimental measurements of pump-turbine with splitter blades used in a domestic pumped storage power station. The results show that as the guide blade opening increases, the rotor-stator interaction of the pump-turbine intensifies and the magnitude of the runner radial force and its pulsation amplitude as well as the magnitude of the guide blade water moment and its pulsation amplitude also increase. In addition, when the opening degree increases from 9.8° to 17.5°, the influence on the main frequency is mainly reflected in the phase change. While the opening degree increases from 17.5° to 24.8°, the influence on the main frequency is mainly reflected in the amplitude change. Moreover, the amplitude of 5 f n at opening 9.8° and opening 24.8° is greater than the optimal opening 17.5°, indicating that deviation from the optimal opening will aggravate the difference of rotor-stator interaction between splitter blades and guide blades. In the paper, the influence of guide blade openings on the rotor-stator interaction between the splitter guide blade is studied, which provides a theoretical reference for the stable operation of the pump-turbine.

Keywords: pump-turbine; splitter blades; rotor-stator interaction; guide vane opening; pressure fluctuations (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2020
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