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Mechanism and propagation characteristics of rotating stall in a mixed-flow pump

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  • Li, Wei
  • Li, Enda
  • Ji, Leilei
  • Zhou, Ling
  • Shi, Weidong
  • Zhu, Yong

Abstract

In order to explore mechanism and propagation characteristics of rotating stall, the unsteady flow characteristics of a mixed-flow pump are calculated based on SST turbulence model. Based on pressure fluctuation characteristics, number of stall cells and circumferential propagation velocity are calculated accurately under different stall conditions. With the circumferential evolution and transfer of stall cell, transient head shows a large periodic fluctuation. Pre-stall stage with weaken dissipation always occurs in the clockwise adjacent path of stall path. When a path is seriously disturbed by stall cell, the blocking effect will change the flow structure of rim flow and intensify the attack angle of downstream path, resulting in the formation of tip initial stall. Then the initial stall cell gradually propagates downstream, and experiences stages of development and attenuation. The fundamental reason for stall propagation is that the existence of stall vortices changes the trajectory of some fluids. The changing trajectory of rim flow is concentrated performance. Hence, distorted rim flow is the main inducement of pre-stall and tip initial stall. Through stall propagation mechanism, stages of flow paths at different time periods can be determined. The results could serve as reference to discover the stall mechanism under critical stall point.

Suggested Citation

  • Li, Wei & Li, Enda & Ji, Leilei & Zhou, Ling & Shi, Weidong & Zhu, Yong, 2020. "Mechanism and propagation characteristics of rotating stall in a mixed-flow pump," Renewable Energy, Elsevier, vol. 153(C), pages 74-92.
    • Handle: RePEc:eee:renene:v:153:y:2020:i:c:p:74-92
    DOI: 10.1016/j.renene.2020.02.003
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    References listed on IDEAS

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    Cited by:

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    6. Ye, Weixiang & Ikuta, Akihiro & Chen, Yining & Miyagawa, Kazuyoshi & Luo, Xianwu, 2020. "Numerical simulation on role of the rotating stall on the hump characteristic in a mixed flow pump using modified partially averaged Navier-Stokes model," Renewable Energy, Elsevier, vol. 166(C), pages 91-107.
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    8. Lin, Tong & Zhu, Zuchao & Li, Xiaojun & Li, Jian & Lin, Yanpi, 2021. "Theoretical, experimental, and numerical methods to predict the best efficiency point of centrifugal pump as turbine," Renewable Energy, Elsevier, vol. 168(C), pages 31-44.
    9. Yang, Gang & Shen, Xi & Shi, Lei & Zhang, Desheng & Zhao, Xutao & (Bart) van Esch, B.P.M., 2023. "Numerical investigation of hump characteristic improvement in a large vertical centrifugal pump with special emphasis on energy loss mechanism," Energy, Elsevier, vol. 273(C).
    10. Zhou, Ling & Hang, Jianwei & Bai, Ling & Krzemianowski, Zbigniew & El-Emam, Mahmoud A. & Yasser, Eman & Agarwal, Ramesh, 2022. "Application of entropy production theory for energy losses and other investigation in pumps and turbines: A review," Applied Energy, Elsevier, vol. 318(C).
    11. Ji, Leilei & Li, Wei & Shi, Weidong & Tian, Fei & Agarwal, Ramesh, 2021. "Effect of blade thickness on rotating stall of mixed-flow pump using entropy generation analysis," Energy, Elsevier, vol. 236(C).
    12. Zhang, Bowen & Cheng, Li & Jiao, Weixuan & Zhang, Di, 2023. "Experimental and statistical analysis of the flap gate energy loss and pressure fluctuation spatiotemporal characteristics of a mixed-flow pump device," Energy, Elsevier, vol. 272(C).
    13. Li, Wei & Long, Yu & Ji, Leilei & Li, Haoming & Li, Shuo & Chen, Yunfei & Yang, Qiaoyue, 2024. "Effect of circumferential spokes on the rotating stall flow field of mixed-flow pump," Energy, Elsevier, vol. 290(C).
    14. Mu, Tong & Zhang, Rui & Xu, Hui & Fei, Zhaodan & Feng, Jiangang & Jin, Yan & Zheng, Yuan, 2023. "Improvement of energy performance of the axial-flow pump by groove flow control technology based on the entropy theory," Energy, Elsevier, vol. 274(C).
    15. Ye, Weixiang & Geng, Chen & Luo, Xianwu, 2022. "Unstable flow characteristics in vaneless region with emphasis on the rotor-stator interaction for a pump turbine at pump mode using large runner blade lean," Renewable Energy, Elsevier, vol. 185(C), pages 1343-1361.
    16. Chengshuo Wu & Jun Yang & Shuai Yang & Peng Wu & Bin Huang & Dazhuan Wu, 2023. "A Review of Fluid-Induced Excitations in Centrifugal Pumps," Mathematics, MDPI, vol. 11(4), pages 1-20, February.

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