Effect of hole patterns on cooling effect of flat air film:numerical simulation

ZHANG Ling; WANG Chong

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Effect of hole patterns on cooling effect of flat air film:numerical simulation

Thermal Power Generation Vol. 44, Issue 4, Pages: 22-26(2015)

更新时间：2025-09-28

- Effect of hole patterns on cooling effect of flat air film:numerical simulation
- 作者机构：
  
  东北电力大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK477
- Published：2015
- 稿件说明：
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ZHANG Ling, WANG Chong. Effect of hole patterns on cooling effect of flat air film:numerical simulation[J]. Thermal Power Generation, 2015, 44(4): 22-26.
DOI：

ZHANG Ling, WANG Chong. Effect of hole patterns on cooling effect of flat air film:numerical simulation[J]. Thermal Power Generation, 2015, 44(4): 22-26. DOI：

摘要

为了研究孔型对平板气膜冷却绝热效率(冷却效率)的影响

基于SSTk-ω紊流模型及Simple算法

采用有限体积法对控制方程进行离散。对不开槽姊妹孔(1个主孔和2个次孔)、开槽圆柱孔以及开槽姊妹孔3种不同孔型的平板气膜冷却效率进行数值模拟

得出吹风比分别为0.5

1.0

1.5

2.0时X/D=4截面的速度云图

以及不同孔型平板气膜的冷却效率。分析结果表明:随着吹风比的增大

3种孔型平板气膜的冷却效率降低;在低吹风比(M=0.5)时开槽姊妹孔平板气膜的平均冷却效率和覆盖区域最优;在高吹风比(M=2.0)时开槽圆柱孔平板气膜的平均冷却效率和覆盖区域最优。

Abstract

In order to study the effects of hole patterns on absolute cooling efficiency of flat gas film

the finite volume method was adopted to discretize the control equations

on the basis of SST k-ωturbulence model and Simple algorithm.Numerical simulation was performed on holes with three shapes

sister hole without groove

groove cylindrical hole and groove sister hole.Under conditions with simulated blowing ratios of 0.5

1.0

1.5and 2.0

the velocity distribution in cross section where X/D=4was obtained

as well as the cooling efficiency of different holes.The results show that

with an increase in blowing ratio

the cooling efficiency of the above three holes decreases.The average cooling efficiency and coverage area of the groove sister hole is the optimum at low blowing ratio(M=0.5)

while that of the groove cylindrical hole is the best at high blowing ratio(M=2.0).

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