IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v15y2022i4p1548-d753561.html
   My bibliography  Save this article

Flow Deflection between Guide Vanes in a Pump Turbine Operating in Pump Mode with a Slight Opening

Author

Listed:
  • Qingfeng Ji

    (Institute of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China
    Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

  • Guoying Wu

    (China Water Resources Pearl River Planning, Surveying and Designing Co. Ltd., PRPSDC, Guangzhou 510610, China)

  • Weili Liao

    (Institute of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Honggang Fan

    (Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China)

Abstract

During the startup and shutdown processes of a reversible-pump turbine (RPT) working in pump mode, abnormal sounds and vibrations usually occur in the distributor when the guide vanes (GVs) are at a slight opening (max opening of about 6%). The objective of this paper is to apply a three-dimensional numerical CFD method to study the unsteady flow behavior in the guide vane region of a pump turbine operating in pump mode. The dynamic meshing technique is introduced to simulate the startup and shutdown processes, and it is shown to be critical in accurately capturing the details of the flow pattern variations. In addition, the RNG k-epsilon two-equation turbulence model is applied and the governing equations are discretized with the finite volume method. Moreover, the boundary conditions are set through the calculation of the transient process of the power station. The results show that the main flow between the GVs is deflected during the startup and shutdown processes. In the shutdown process, the deflection occurs when the guide vane opening (GVO) is between 1.99 and 5.32 degrees, on average. In the startup process, the deflection occurs when the GVO is between 2.83 and 4.11 degrees, on average. In these processes, the velocity field and pressure field change dramatically. Simultaneously, the hydraulic torque (HT) on the GVs has a sharp change. The abrupt change in the HT leads to vibrations and abnormal sounds.

Suggested Citation

  • Qingfeng Ji & Guoying Wu & Weili Liao & Honggang Fan, 2022. "Flow Deflection between Guide Vanes in a Pump Turbine Operating in Pump Mode with a Slight Opening," Energies, MDPI, vol. 15(4), pages 1-18, February.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1548-:d:753561
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/15/4/1548/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/15/4/1548/
    Download Restriction: no
    ---><---

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Weixuan Jiao & Zhishuang Li & Li Cheng & Yuqi Wang & Bowen Zhang, 2022. "Study on the Hydraulic and Energy Loss Characteristics of the Agricultural Pumping Station Caused by Hydraulic Structures," Agriculture, MDPI, vol. 12(11), pages 1-16, October.
    2. John Cimbala & Bryan Lewis, 2022. "Advancements in Hydropower Design and Operation for Present and Future Electrical Demand," Energies, MDPI, vol. 15(7), pages 1-2, March.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1548-:d:753561. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.