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Investigation on the effect of forward skew angle blade on the hump characteristic in a mixed flow pump using modified partially averaged Navier-Stokes model

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  • Ye, Weixiang
  • Ikuta, Akihiro
  • Chen, Yining
  • Miyagawa, Kazuyoshi
  • Luo, Xianwu

Abstract

A mixed flow pump is regarded as an important power facility in the hydropower field for renewable energy. Pump impeller design shows a great attempt to alleviate the hump characteristic and suppress the severe pressure fluctuations as the mixed flow pumps operate under part-load conditions. In this respect, an advanced turbulence model, i.e., modified SST k-ω partially averaged Navier-Stokes (MSST PANS) model, was adopted to numerically investigate the effect of forward skew angle blade on the hump characteristic using different impeller blades. Both experimental and numerical results indicate that the pump with forward skew angle blade shifts the hump region to the deeper part-load region. In the pump impeller with the forward skew angle blades, a synchronous stall cell is observed near the blade leading edge and near the hub side, while typical rotating stall cell evolution is observed in the conventional pump impeller. Analysis on the blade loading also indicates that under the unstable condition, the forward skew angle blade could switch the mid-loaded distribution to the fore-loaded distribution. Finally, the low frequency pressure fluctuations induced by the rotating stall cell evolution could be also eliminated successfully as the forward skew angle impeller blades are adopted.

Suggested Citation

  • Ye, Weixiang & Ikuta, Akihiro & Chen, Yining & Miyagawa, Kazuyoshi & Luo, Xianwu, 2021. "Investigation on the effect of forward skew angle blade on the hump characteristic in a mixed flow pump using modified partially averaged Navier-Stokes model," Renewable Energy, Elsevier, vol. 170(C), pages 118-132.
    • Handle: RePEc:eee:renene:v:170:y:2021:i:c:p:118-132
    DOI: 10.1016/j.renene.2021.01.122
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    Citations

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    Cited by:

    1. 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).
    2. 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).
    3. 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.

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