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Research on Cavitation Wake Vortex Structures Near the Impeller Tip of a Water-Jet Pump

Author

Listed:
  • Yun Long

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Mingyu Zhang

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Zhen Zhou

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Jinqing Zhong

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Ce An

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

  • Yong Chen

    (State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Churui Wan

    (Marine Design and Research Institute of China, NO 1688 South Xizang Road, Shanghai 200011, China)

  • Rongsheng Zhu

    (National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China)

Abstract

Cavitation can cause noise in the water-jet pump. If cavitation occurs in the water-jet pump, the hydraulic components in the pump are prone to erosion. The surface erosion reduces energy delivery efficiency and increases maintenance costs. The decline in pump performance will lead to the instability of the entire energy system. In this paper, the cavitation flow structure of the water-jet pump is studied by the method of numerical simulation and experiment, which provides a reference for the prediction and improvement of cavitation. Based on the closed test platform, in order to reveal the physical process of cavitation evolution, high-speed photography is used to capture the complex cavitation flow phenomenon in the pump. After that, the cavitation vortex structure was further explored by numerical simulation. Through the simulation of the impeller blade tip leakage flow and the Tip Leakage Vortex Cavitation (TLVC) characteristics under different cavitation conditions, the flow mechanism of the impeller blade tip leakage flow and the separation vortex induced by the cavitation region under different cavitation conditions were revealed. The main factors affecting the development of the cavitation wake vortex structures were summarized.

Suggested Citation

  • Yun Long & Mingyu Zhang & Zhen Zhou & Jinqing Zhong & Ce An & Yong Chen & Churui Wan & Rongsheng Zhu, 2023. "Research on Cavitation Wake Vortex Structures Near the Impeller Tip of a Water-Jet Pump," Energies, MDPI, vol. 16(4), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1576-:d:1057905
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    References listed on IDEAS

    as
    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. Ge, Mingming & Manikkam, Pratulya & Ghossein, Joe & Kumar Subramanian, Roshan & Coutier-Delgosha, Olivier & Zhang, Guangjian, 2022. "Dynamic mode decomposition to classify cavitating flow regimes induced by thermodynamic effects," Energy, Elsevier, vol. 254(PC).
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