Experiment of cooling effectiveness with double-outlet film hole

LI Guang-chao; LING Xu; KOU Zhi-hai; WU Chao-lin; ZHANG Wei

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Experiment of cooling effectiveness with double-outlet film hole

更新时间：2026-07-07

- Experiment of cooling effectiveness with double-outlet film hole
- Issue 5, (2014)
- 作者机构：
  
  沈阳航空航天大学航空航天工程学部辽宁省航空推进系统先进测试技术重点实验室,沈阳,110136
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014
- 稿件说明：
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LI Guang-chao, LING Xu, KOU Zhi-hai, et al. Experiment of cooling effectiveness with double-outlet film hole[J]. 2014, (5).
DOI：

LI Guang-chao, LING Xu, KOU Zhi-hai, et al. Experiment of cooling effectiveness with double-outlet film hole[J]. 2014, (5). DOI：

摘要

为了进一步理解双出口气膜孔的冷却特性，建立了气膜冷却效率实验台，通过红外测温技术研究了圆孔和4个不同次孔方位角的双出口孔在吹风比为0.3~2.0时的冷却效率.结果表明：和圆孔相比，次孔方位角为30°，45°，60°双出口孔能提高面平均冷却效率18%~37%.次孔方位角为30°双出口孔在低吹风比下提高冷却效率最显著，次孔方位角为60°双出口孔在高吹风比下提高冷却效率最显著.在研究的吹风比范围内，次孔方位角为45°双出口孔都能较显著地提高冷却效率，次孔方位角为75°双出口孔冷却效率低于圆孔冷却效率.

Abstract

In order to understand the cooling characteristics of the double-outlet film holes further

the platform for testing film cooling effectiveness was established.The cooling effectiveness of the cycle holes and four kinds of double-outlet holes with various orientation angles was studied at the blowing ratios from 0.3 to 2.0 by infrared measurement.The results show that:compared with the cycle hole

the surface averaged cooling effectiveness of the double-outlet holes is improved by 18%-37% with 30

45 and 60 degrees of orientation angles.At the low blowing ratios

the cooling effectiveness of the double-outlet holes with 30 degree of orientation angles is most significantly improved.At the high blowing ratios

the cooling effectiveness of double-outlet holes with 60 degree of orientation angles is most significantly improved.The double-outlet holes with 45 degree orientation angles can significantly improve the cooling effectiveness at both high and low blowing ratios.The cooling effectiveness of the double-outlet holes with 75 degree of orientation angles is lower than that of the cylindrical holes.

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Related Institution

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Aeronautic and Astronautic Engineering College, Air Force Engineering University

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