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Numerical investigation of unsteady characteristics of a pump turbine under runaway condition

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  • Lu, Jie
  • Qian, Zhongdong
  • Lee, Young-Ho

Abstract

The runaway condition is unsteady and is of significant importance in pump turbines. In this research, the shear-stress transport (SST) k-ω turbulence model is used to simulate the unsteady flow in the vaneless region and the runner of a prototype pump turbine. The characteristics of pressure fluctuations, vortex identification based on Q criterion and local entropy generation rate (LEGR) in the pump turbine under runaway condition are studied, and the relationships of these physical quantities in the vaneless region are determined. Internal flow research reveals the motion and transmission characteristics of vortices in the vaneless region and the runner. The results show that the vortices that move clockwise in the vaneless region are responsible for the flow separation, the increase of LEGR, and the generation of the characteristic frequency 1.4fn of these physical quantities (pressure fluctuations, Q criterion and LEGR). In runner, it is found that the characteristic frequency of pressure fluctuation is 3.6fn, which satisfies a linear relationship with the characteristic frequency 1.4fn in the vaneless region. The vortices, moving in the vaneless and runner region, interact with the blades of runner and mainly contribute to the pressure fluctuation characteristic frequency in the runner.

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  • Lu, Jie & Qian, Zhongdong & Lee, Young-Ho, 2021. "Numerical investigation of unsteady characteristics of a pump turbine under runaway condition," Renewable Energy, Elsevier, vol. 169(C), pages 905-924.
    • Handle: RePEc:eee:renene:v:169:y:2021:i:c:p:905-924
    DOI: 10.1016/j.renene.2021.01.063
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    References listed on IDEAS

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    1. Cavazzini, Giovanna & Houdeline, Jean-Bernard & Pavesi, Giorgio & Teller, Olivier & Ardizzon, Guido, 2018. "Unstable behaviour of pump-turbines and its effects on power regulation capacity of pumped-hydro energy storage plants," Renewable and Sustainable Energy Reviews, Elsevier, vol. 94(C), pages 399-409.
    2. Ma, Zhe & Zhu, Baoshan, 2020. "Pressure fluctuations in vaneless space of pump-turbines with large blade lean runners in the S- shaped region," Renewable Energy, Elsevier, vol. 153(C), pages 1283-1295.
    3. Rezghi, A. & Riasi, A., 2016. "Sensitivity analysis of transient flow of two parallel pump-turbines operating at runaway," Renewable Energy, Elsevier, vol. 86(C), pages 611-622.
    4. Zhang, Wenwu & Chen, Zhenmu & Zhu, Baoshan & Zhang, Fei, 2020. "Pressure fluctuation and flow instability in S-shaped region of a reversible pump-turbine," Renewable Energy, Elsevier, vol. 154(C), pages 826-840.
    5. Zuo, Zhigang & Fan, Honggang & Liu, Shuhong & Wu, Yulin, 2016. "S-shaped characteristics on the performance curves of pump-turbines in turbine mode – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 836-851.
    6. Zijie Wang & Baoshan Zhu & Xuhe Wang & Daqing Qin, 2017. "Pressure Fluctuations in the S-Shaped Region of a Reversible Pump-Turbine," Energies, MDPI, vol. 10(1), pages 1-13, January.
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