双层壁冷却结构中多排射流冲击冷却的换热和流阻特性

韦宏; 祖迎庆

doi:10.13224/j.cnki.jasp.20200486

双层壁冷却结构中多排射流冲击冷却的换热和流阻特性

doi: 10.13224/j.cnki.jasp.20200486

韦宏^1,2,
祖迎庆^1, ,

1. 复旦大学航空航天系, 上海 200433;
2. 上海交通大学机械与动力工程学院, 上海 200240

基金项目:

上海市自然科学基金（19ZR1402500）；上海市商用航空发动机领域联合创新计划（AR908）

详细信息

作者简介:
韦宏(1988-),男,博士,主要从事航空发动机热端部件冷却技术和高超声速飞行器预冷器的结霜和抑霜等方面的研究。

通讯作者:
祖迎庆(1978-),男,副研究员,博士,主要从事航空发动机气动热力学研究。E-mail:yzu@fudan.edu.cn

中图分类号: V231.1
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- 文章访问数: 201
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- 被引次数: 0
出版历程
- 收稿日期: 2020-11-13
- 刊出日期: 2021-08-28

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

WEI Hong^1,2,
ZU Yingqing^{1
, ,}

1. Department of Aeronautics and Astronautics, Fudan University, Shanghai 200433, China;
2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

摘要

摘要: 采用稳态热敏液晶技术对双层壁冷却结构中的多排（包括顺排和叉排）射流冲击冷却结构进行了风洞实验，同时结合数值模拟的方法，对两种射流冲击冷却结构的传热和流阻特性的差异进行了研究。实验结果表明：流量系数和冲击靶板上的努塞尔数均随着雷诺数的增大而增大，而冲击孔的排布方式对面平均努塞尔数的影响较小，但是叉排结构的流量系数高于顺排结构，且冲击靶板上换热更加均匀。数值结果显示冲击靶板中心区域的流量分配和换热均随着冲击距离的增大而增大；而在下游区域内恰好与之相反。
- 射流冲击冷却 /
- 冲击距离 /
- 努塞尔数 /
- 雷诺数 /
- 流量系数
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.
- jet impingement cooling /
- impact distance /
- Nusselt number /
- Reynolds number /
- discharge coefficient

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参考文献(21)

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