Influence of temperature ratio on cooling efficiency of 3-in-1 hole injection film

LI Guangchao; FU Jian; LIU Yongquan; DU Zhineng; ZHANG Wei

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Influence of temperature ratio on cooling efficiency of 3-in-1 hole injection film

Thermal Power Generation Vol. 44, Issue 4, Pages: 50-55(2015)

更新时间：2025-09-28

- Influence of temperature ratio on cooling efficiency of 3-in-1 hole injection film
- 作者机构：
  
  1. 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
  2. 中国航空工业集团公司沈阳发动机设计研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK473
- Published：2015
- 稿件说明：
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LI Guangchao, FU Jian, LIU Yongquan, et al. Influence of temperature ratio on cooling efficiency of 3-in-1 hole injection film[J]. Thermal Power Generation, 2015, 44(4): 50-55.
DOI：

LI Guangchao, FU Jian, LIU Yongquan, et al. Influence of temperature ratio on cooling efficiency of 3-in-1 hole injection film[J]. Thermal Power Generation, 2015, 44(4): 50-55. DOI：

摘要

为了探讨冷热流体真实温比与小温比的气膜冷却特性差别

采用湍流模型及Fluent软件

对吹风比Br分别为0.5和2.0

温比Tr分别为1.1和2.0的双向扩张孔射流气膜的流场、温度场和冷却效率分布进行研究。结果表明:Br=0.5时

2种温比下的冷气扩散基本一致

径向平均冷却效率差别不大;Br=2.0时

Tr=2.0的冷气径向扩散优于Tr=1.1的

径向平均冷却效率较Tr=1.1时增幅13.4%~55.5%。

Abstract

To explore the difference of film cooling characteristics between small temperature ratio and real temperature ratio of the coolant and gas

the flow field

temperature field and film cooling efficiency of3-in-1hole injection film were studied

on the basis of Fluent software

by using the realizable k-ε model with temperature ratio of 1.1and 2.0

the blowing ratio of 0.5and 2.0.The results show that

at blowing ratio of 0.5

the diffusions of coolant with both temperature ratios are identical and the radial average cooling efficiency has little difference.At blowing ratio of 2.0

the coolant radial diffusion with temperature ratio of 2.0is better than that with temperature ratio of 1.1.The radial average cooling efficiency with temperature ratio of 2.0is about 13.4%to 55.5% higher.

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