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Research on the Vortex Rope Control Techniques in Draft Tube of Francis Turbines

Author

Listed:
  • Lei Wang

    (Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China)

  • Jiayi Cui

    (School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
    College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China)

  • Lingfeng Shu

    (Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China)

  • Denghui Jiang

    (Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China)

  • Chun Xiang

    (School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China)

  • Linwei Li

    (Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China)

  • Peijian Zhou

    (College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China)

Abstract

Francis turbines are most widely used in hydropower due to their characteristics which include a fast response and wide time-scale operation. The vortex rope inside Francis turbines is a common flow phenomenon, which always causes strong vibration, pressure pulsations, fatigue load, and even serious failure of the components. Vortex suppression methods can effectively change the velocity and pressure distribution of the flow field in the draft tube, reduce the volume of vortex rope and the amplitude of pressure pulsation, inhibit the development of cavitation erosion, and improve the operation stability of the hydro turbine. However, the vortex suppression method is not suitable for all working conditions, and the vortex suppression effect is also different. There are still many problems with how to analyze the vortex suppression effect and practicability of the turbine from multi-dimensions. It is of great significance to analyze the vortex suppression techniques and their practicability in hydraulic turbines from various aspects. The primary focus of the present study is to analyze the hazards of vortex rope in draft tubes and summarize the methods of suppressing vortex rope and pressure pulsation. This review article provides a basis for controlling the vortex rope in the draft tube, which can help the designers choose the suitable control method to mitigate it. Future research directions are also briefly discussed.

Suggested Citation

  • Lei Wang & Jiayi Cui & Lingfeng Shu & Denghui Jiang & Chun Xiang & Linwei Li & Peijian Zhou, 2022. "Research on the Vortex Rope Control Techniques in Draft Tube of Francis Turbines," Energies, MDPI, vol. 15(24), pages 1-27, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9280-:d:996318
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    References listed on IDEAS

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