Experimental investigation of a double-decker jet impingement/film structure's cooling coefficient

LIU Zhen-xiong; MAO Jun-kui; GUO Wen; JIANG Hefu

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Experimental investigation of a double-decker jet impingement/film structure's cooling coefficient

更新时间：2026-07-07

- Experimental investigation of a double-decker jet impingement/film structure's cooling coefficient
- Vol. 22, Issue 2, (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,南京,210016
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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LIU Zhen-xiong, MAO Jun-kui, GUO Wen, et al. Experimental investigation of a double-decker jet impingement/film structure's cooling coefficient[J]. 2007, 22(2).
DOI：

LIU Zhen-xiong, MAO Jun-kui, GUO Wen, et al. Experimental investigation of a double-decker jet impingement/film structure's cooling coefficient[J]. 2007, 22(2). DOI：

摘要

以双层壳型冲击/气膜复合冷却结构的平壁模型作为研究对象

进行了该种冷却结构的复合冷却效果实验研究.研究中改变冷热气流吹风比M

冲击距H/d

冲击孔和气膜孔间距与冲击孔直径之比P/d等参数

利用红外热像仪拍摄实验件的温度分布.研究结果表明:上述参数均影响双层壳型冲击/气膜复合冷却效果

而且影响规律表现出较强的关联性.随着吹风比的增加

复合冷却效果逐步增强;在实验工况条件下

存在一个最佳冲击距H/d范围使得复合冷却效果最佳;同时在冲击孔和气膜孔之间也存在一个最佳的P/d范围

使得复合冷却效果达到最大.当H/d=0.5和P/d=4时

双层壳型冲击/气膜复合冷却结构能达到最佳的冷却效果.

Abstract

Experiments were conducted out to investigate cooling coefficient of a lamellar double-decker jet impingement/film structure.Blowing rate M

the ratio of the jet impingement distance to the diameter of the jet hole H/d

and the ratio of the distance between the jet hole and film hole to the diameter of the jet hole P/d were changed to study the rules of local cooling coefficient varying with these parameters.All the results show that higher cooling coefficient was achieved under larger blowing rate conditions.And there exists a proper range of H/d and P/d

which can result in a maximum cooling coefficient.It is verified that when H/d=0.5 and P/d=4

the maximum cooling coefficient can be achieved.

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