Experimental Study on Effects of Near-wall Streamwise Vortex on the Film Cooling Performance of Multi-row Fan-shaped Holes

WANG Jianan; CUI Xiaofeng; LIN Chixiang; DAI Ren

doi:10.19805/j.cnki.jcspe.2025.240177

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Experimental Study on Effects of Near-wall Streamwise Vortex on the Film Cooling Performance of Multi-row Fan-shaped Holes

更新时间：2025-10-16

- Experimental Study on Effects of Near-wall Streamwise Vortex on the Film Cooling Performance of Multi-row Fan-shaped Holes
- Chinese Journal of Power Engineering Vol. 45, Issue 5, Pages: 654-661(2025)
- 作者机构：
  
  上海理工大学能源与动力工程学院,上海,200093
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240177
  CLC： TK471
- Published Online：19 May 2025，
  
  Published：2025
- 稿件说明：
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王佳男,崔晓峰,林翅翔,戴韧. 近壁流向涡对多排孔气膜冷却效率影响的实验研究动力工程学报, 2025, 45(5): 654-661 https://doi.

org/10.19805/j.cnki.jcspe.2025.240177
王佳男,崔晓峰,林翅翔,戴韧. 近壁流向涡对多排孔气膜冷却效率影响的实验研究动力工程学报, 2025, 45(5): 654-661 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240177.

org/10.19805/j.cnki.jcspe.2025.240177 DOI：

摘要

在平板气膜实验台上安装涡流发生器生成流向涡

研究了叶栅端区二次流对多排扇形孔气膜冷却效率的影响。实验测量了四排气膜孔的绝热气膜冷却效率

并基于Sellers公式分析各排孔气膜冷却效率受影响程度的差异。结果表明:受涡旋向的影响

气膜覆盖沿涡的运动路线发生扭曲

气膜冷却效率下降

在第二排涡流核心处形成热斑;涡流的影响程度与气膜吹风比有关

近壁涡主要降低了前两排孔的气膜冷却效率;第一排孔的气膜冷却效率下降明显

而第二排孔的降幅减少

对后排孔的影响逐排减弱

第三排孔以后的气膜基本不受影响。

Abstract

A vortex generator was installed on a flat film experimental platform to generate streamwise vortices

and the effect of secondary flow in the blade end region on the film cooling effect of multi-row fan-shaped holes was studied. The adiabatic film cooling efficiencies of four row film holes were experimentally measured

and the influence of the film cooling efficiency of each row of holes was analyzed based on the Sellers formula. Results show that the air film coverage distorts along the motion path of the vortex due to the influence of the vortex direction

leading to a decrease in the cooling effect of the air film and the formation of hot spots at the core of the second row of vortices. The influence degree of vortices is related to the air film blowing ratio

and near wall vortices mainly reduce the air film cooling effect of the first two rows of holes. The cooling efficiency of the first row of holes significantly decreases

while the decrease value of the second row of holes is decreasing and the impact on the rear row of holes is gradually weakened. The air film after the third row of holes is basically not affected.

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references

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