Heat transfer and flow resistance characteristics of multi⁃row jet impingement cooling in double⁃wall cooling structure

被引：0
|
作者：
Wei H. [1 ,2 ]
Zu Y. [1 ]
机构：
[1] Department of Aeronautics and Astronautics, Fudan University, Shanghai
[2] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2021年 / 36卷 / 08期
关键词：
Discharge coefficient; Impact distance; Jet impingement cooling; Nusselt number; Reynolds number;
D O I：
10.13224/j.cnki.jasp.20200486
中图分类号：
学科分类号：
摘要：
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. © 2021, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：1621 / 1632
页数：11
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