Investigation on film cooling effectiveness of fanned hole with broad outlet

LI Guangchao; CHEN Yukai; ZHANG Wei; KOU Zhihai

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Investigation on film cooling effectiveness of fanned hole with broad outlet

更新时间：2025-09-28

- Investigation on film cooling effectiveness of fanned hole with broad outlet
- Thermal Power Generation Vol. 45, Issue 4, Pages: 60-64(2016)
- 作者机构：
  
  沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK14
- Published：2016
- 稿件说明：
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LI Guangchao, CHEN Yukai, ZHANG Wei, et al. Investigation on film cooling effectiveness of fanned hole with broad outlet[J]. Thermal power generation, 2016, 45(4): 60-64.
DOI：

LI Guangchao, CHEN Yukai, ZHANG Wei, et al. Investigation on film cooling effectiveness of fanned hole with broad outlet[J]. Thermal power generation, 2016, 45(4): 60-64. DOI：

摘要

为了揭示宽口扇形孔射流提高冷却效率的机理

采用商业软件及k-ε模型对吹风比为0.5

1.0

1.5和2.0的宽口扇形孔射流气膜冷却效率进行了数值模拟及分析。结果表明:宽口扇形孔射流有效地增加了冷气径向覆盖范围

冷气和燃气掺混后的流场相比于圆柱孔射流流场更有利冷气贴附于壁面

其冷却效率明显高于圆柱孔射流冷却效率;宽口扇形孔射流在吹风比为1.0

1.5和2.0时的冷却效率差别较小

且均明显大于吹风比为0.5时的冷却效率。

Abstract

The film cooling performance of fanned hole with broad outlet was numerically investigated by Fluent software and model.The kidney-shaped vortex structure at the various blowing rations(0.5

1.0

1.5and 2.0)was focused on.The numerical results show that

the fan shaped hole jet effectively increases the radial coverage of the cooling air.Compared with the injection field of the cylindrical hole

the cold air and gas mixed field is more helpful for the cold air adhering to the wall

and its film cooling effectiveness is higher than that of the cylindrical hole injection.The film cooling effectiveness at blowing ratios of 1.0

1.5and 2.0has small difference

and they are all obviously higher than the film cooling effectiveness at blowing ratio of 0.5.

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