热力发电2025，Vol.54Issue(12)：27-38,12.DOI:10.19666/j.rlfd.202503033
一种增强气膜冷却的瓦片涡流发生器性能研究
Research on performance of a tile vortex generator with enhanced film cooling
摘要
Abstract
In order to solve the technical problem that the cooling margin of the cylindrical hole is insufficient at low blowing ratios and the cold flow is separated from the wall at high blowing ratios,based on the tip-covered vortex generator(TCVG),a new type of vortex generator(VG)is proposed,which is called tile-shaped vortex generator(TVG).The conventional cylindrical hole and the cylindrical hole with TVG are numerically simulated.The results show that the film cooling efficiency of the cylindrical hole with TVG is 200%higher than that of the conventional cylindrical hole.Moreover,it solves the problem that the cold flow of the conventional cylindrical film hole will separate from the wall at high blowing ratios.With the increase of TVG width,the film cooling efficiency increases,and tends to be stable when the width reaches twice the film hole diameter.With the increase of TVG height,the suppression effect of TVG on cold flow is weakened,and there is an uncooled gap in the near-field area at high blowing ratios,and the film cooling efficiency shows a downward trend.The expansion angle of TVG has little effect on the film cooling effect,and the optimal expansion angle is 7.5°.关键词
气膜冷却/瓦片形涡流发生器/吹风比/冷却效率/数值模拟Key words
film cooling/tile-shaped vortex generator/blowing ratio/cooling efficiency/numerical simulation引用本文复制引用
MA Penghui,KOU Zhihai,YIN Xunyan,LI Guangchao,WEI Haiqiao..一种增强气膜冷却的瓦片涡流发生器性能研究[J].热力发电,2025,54(12):27-38,12.基金项目
国家自然科学基金项目(52376028)National Natural Science Foundation of China(52376028) （52376028）
