Experimental investigation of the local heat transfer of impinging cooling with outflow film in closed small space

MAO Jun-kui; GUO Wen; CHANG Hai-ping; XU Lei; ZHANG Jing-yang; CHANG Guo-qiang

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Experimental investigation of the local heat transfer of impinging cooling with outflow film in closed small space

更新时间：2026-07-07

- Experimental investigation of the local heat transfer of impinging cooling with outflow film in closed small space
- Vol. 22, Issue 3, (2007)
- 作者机构：
  
  1. 南京航空航天大学能源与动力学院,南京,210016
  2. 中国燃气涡轮研究院涡轮室,成都,610500
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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MAO Jun-kui, GUO Wen, CHANG Hai-ping, et al. Experimental investigation of the local heat transfer of impinging cooling with outflow film in closed small space[J]. 2007, 22(3).
DOI：

MAO Jun-kui, GUO Wen, CHANG Hai-ping, et al. Experimental investigation of the local heat transfer of impinging cooling with outflow film in closed small space[J]. 2007, 22(3). DOI：

摘要

利用相似理论的原理

试验研究了封闭小空间内冲击/气膜复合冷却内表面的换热特性.研究中通过改变冲击Re数（1000040000）、冲击距离H和冲击孔直径D之比H/D（0.172.0）

在2种冲击孔和气膜孔间距P和冲击孔直径D之比P/D（0

1）条件下

细致分析冲击Re数、H/D对复合冷却内表面局部换热特性的影响.结果表明

在本文的试验工况中

冲击靶板上的局部Nu数随着冲击Re的增加而不断变大

而Nu数随着H/D的变化规律并非单调.当P/D=0

H/D=2时换热效果达到最佳;P/D=1时

在X/D=±3范围内

小冲击Re数条件下H/D=0.17和H/D=2的换热效果比较接近

大冲击Re数条件下H/D=1和H/D=2的换热效果比较接近.

Abstract

Experiments were carried out to investigate the heat transfer of compound cooling（impinging cooling with outflow film）.Local heat transfer coefficients on inner surface were obtained over a Reynolds number range of 10 000～40 000

nozzle-to-plate spacing H/D range of 0.17～2.0

the ratio between impinging jet and film hole distance to jet hole diameter P/D range of 0 and 1.Experimental results show that the local heat transfer coefficient was affected by impingement Reynolds number and nozzle-to-plate spacing greatly.Under the parameters in this paper

the local Nu number increased with the impingement Reynolds number.When P/D=0

the maximum Nu number was achieved while H/D=2.When P/D increased to unity

the maximum Nu number was gotten while H/D=2 and 0.17 under lower impingement Reynolds number.And this proper value of H/D will change to be 2 and 1 under higher impingement Reynolds number.

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LIU Xiang-yun

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TAO Zhi

XU Guo-qiang

Related Institution

School of Astronautics, Beijing University of Aeronautics and Astronautics

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National Key Laboratory on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics

College of Aeronautic Science & Technology, Beijing University of Aeronautics and Astronautics

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