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Experimental Investigation on the Effect of the Staggered Impeller on the Unsteady Pressure Pulsations Characteristic in a Pump

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Listed:
  • Dan Ni

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
    Shanghai Kaiquan Pump (Group) Co., Ltd., Shanghai 201800, China)

  • Feifan Wang

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
    Shanghai Kaiquan Pump (Group) Co., Ltd., Shanghai 201800, China)

  • Bo Gao

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Yang Zhang

    (Shanghai Marine Equipment Research Institute (SMERI), Shanghai 200031, China)

  • Shiyuan Huang

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

Abstract

High−energy pressure pulsation induced by rotor−stator interaction (RSI) is the primary source of flow−induced vibration noise in the pump, affecting the pump’s stability and system operation. In order to find an effective method to suppress the pressure pulsation in the pump caused by RSI, a new staggered impeller is proposed in this paper, which can significantly suppress the pressure pulsation energy. The unsteady pressure pulsation characteristic of the original impeller and the staggered impeller scheme are measured and analyzed under different working flow conditions. The results show that although the hydraulic performance of the model pump decreases to a certain extent when the staggered impeller is used, the pressure pulsation energy in the pump decreases significantly. Under 0.8 Q N –1.2 Q N working flow conditions, the energy suppression effect of the blade passing frequency ( f bpf ) amplitude is higher than 80% with the staggered impeller scheme. The Root Mean Square ( RMS ) values for distribution of pressure pulsation in different frequency bands varies greatly, and the pressure pulsation energy near the tongue is prominent. On a broader frequency band (0–6 f bpf ), the pressure pulsation energy of the staggered impeller scheme is smaller than that of the original impeller scheme. With the expansion of the frequency band, the pressure pulsation energy decreased steadily, with a minimum decrease of 37.33%.

Suggested Citation

  • Dan Ni & Feifan Wang & Bo Gao & Yang Zhang & Shiyuan Huang, 2022. "Experimental Investigation on the Effect of the Staggered Impeller on the Unsteady Pressure Pulsations Characteristic in a Pump," Energies, MDPI, vol. 15(23), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8912-:d:983834
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    References listed on IDEAS

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    1. Zhang, Ning & Liu, Xiaokai & Gao, Bo & Xia, Bin, 2019. "DDES analysis of the unsteady wake flow and its evolution of a centrifugal pump," Renewable Energy, Elsevier, vol. 141(C), pages 570-582.
    2. Ni, Dan & Zhang, Ning & Gao, Bo & Li, Zhong & Yang, Minguan, 2020. "Dynamic measurements on unsteady pressure pulsations and flow distributions in a nuclear reactor coolant pump," Energy, Elsevier, vol. 198(C).
    3. Ran Tao & Ruofu Xiao & Zhengwei Wang, 2018. "Influence of Blade Leading-Edge Shape on Cavitation in a Centrifugal Pump Impeller," Energies, MDPI, vol. 11(10), pages 1-16, September.
    4. Heng Qian & Denghao Wu & Chun Xiang & Junwei Jiang & Zhibing Zhu & Peijian Zhou & Jiegang Mou, 2022. "A Visualized Experimental Study on the Influence of Reflux Hole on the Double Blades Self-Priming Pump Performance," Energies, MDPI, vol. 15(13), pages 1-11, June.
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    Cited by:

    1. Dan Ni & Hongzhong Lu & Shiyuan Huang & Sheng Lu & Yang Zhang, 2023. "Experimental Study on PIV Measurement and CFD Investigation of the Internal Flow Characteristics in a Reactor Coolant Pump," Energies, MDPI, vol. 16(11), pages 1-21, May.

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