IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v18y2025i8p2042-d1635926.html
   My bibliography  Save this article

A Numerical Study on Leakage Flow in the Shroud Cavity of a Centrifugal Impeller

Author

Listed:
  • Jiaxi Chen

    (Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100191, China
    School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Zhitao Zuo

    (Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100191, China
    School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
    National Energy Large Scale Physical Energy Storage Technologies R&D Center (Bijie), Bijie 551712, China)

  • Jixiang Chen

    (Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100191, China
    School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China)

  • Jianting Sun

    (Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100191, China)

  • Haisheng Chen

    (Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100191, China
    School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
    National Energy Large Scale Physical Energy Storage Technologies R&D Center (Bijie), Bijie 551712, China)

Abstract

A high-pressure centrifugal compressor with a shroud cavity is a key piece of energy equipment found in a compressed air energy storage (CAES) system. The leakage flow of the shroud cavity is an important factor affecting the efficiency of the system. Using systematic numerical studies, the influence of leakage flow on high-pressure centrifugal compressors under different leakage rates has been comprehensively elucidated. The study reveals that the leakage flow significantly increases the circumferential swirl angle of the flow at the impeller inlet, thereby exerting a significant influence on the flow characteristics within the impeller. As the leakage rate increases, the stable operating range of the compressor is significantly reduced, with the total pressure ratio decreasing by up to 2% and the isentropic efficiency dropping by up to 4 percentage points.

Suggested Citation

  • Jiaxi Chen & Zhitao Zuo & Jixiang Chen & Jianting Sun & Haisheng Chen, 2025. "A Numerical Study on Leakage Flow in the Shroud Cavity of a Centrifugal Impeller," Energies, MDPI, vol. 18(8), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:8:p:2042-:d:1635926
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/18/8/2042/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/18/8/2042/
    Download Restriction: no
    ---><---

    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:18:y:2025:i:8:p:2042-:d:1635926. 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.