Volume 36 Issue 8
Aug.  2021
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WEI Hong, ZU Yingqing. Heat transfer and flow resistance characteristics of multi-row jet impingement cooling in double-wall cooling structure[J]. Journal of Aerospace Power, 2021, 36(8): 1621-1632. doi: 10.13224/j.cnki.jasp.20200486
Citation: WEI Hong, ZU Yingqing. Heat transfer and flow resistance characteristics of multi-row jet impingement cooling in double-wall cooling structure[J]. Journal of Aerospace Power, 2021, 36(8): 1621-1632. doi: 10.13224/j.cnki.jasp.20200486
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Heat transfer and flow resistance characteristics of multi-row jet impingement cooling in double-wall cooling structure

doi: 10.13224/j.cnki.jasp.20200486

  • 1. Department of Aeronautics and Astronautics, Fudan University, Shanghai 200433, China;

  • 2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

  • Received Date: 2020-11-13
  • Publish Date: 2021-08-28
    Abstract
  • The heat transfer and flow resistance characteristics of the jet impingement cooling in double-wall cooling structure were experimentally and numerically studied. The cooling structure with inline and staggered patterns were experimentally studied in the wind tunnel with steady-state thermo-chromic liquid crystal technology, and the differences of heat transfer and flow resistance characteristics of two structures were studied. The experimental results indicated that both the discharge coefficient and Nusselt number on the target plate increased with the increase of Reynolds number, and the influence of impingement hole arrangement on the averaged Nusselt number was small. However, the discharge coefficient of the staggered cooling structure was higher than that of the inline pattern, and the heat transfer on the target plate was more uniform. Furthermore, the numerical results showed that distribution of the mass flow rate and the heat transfer in the central region of target plate increased with the increase of impact distance, while the opposite phenomenon occurred in the downstream area.

     

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