不同开槽结构对气膜冷却效果的影响研究  

Study on the Influence of Different Slot Structures on the Cooling Effect of Gas Film

作　　者：王旭 戴萍 王少卿 周永洋 季天宇 WANG Xu;DAI Ping;WANG Shao-qing;ZHOU Yong-yang;JI Tian-yu(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,青岛266061

出　　处：《汽轮机技术》2025年第1期42-48,共7页Turbine Technology

基　　金：山东省重点研发科技攻关项目(2019GGX104034)。

摘　　要：研究了不同吹风比下圆形孔、横向槽、圆弧槽以及阶梯槽气膜孔的气膜冷却效率,对相同槽宽、槽深情况下不同开槽结构的作用效果进行研究。结果表明,横向槽能够使下游产生反肾形涡对抑制了肾形涡对的不利影响,中低吹风比下其冷却优势最为明显。圆弧槽在射流经过其下游槽壁的圆弧结构时,会发生科恩达效应产生一个高效冷却区域,提高了气膜贴壁性。阶梯槽通过阶梯结构促使射流在下游槽壁产生了2个二次流,进而提高了气膜展向上的流动,增大了气膜覆盖面积。The film cooling efficiency of circular hole,transverse groove,arc groove and step groove film hole under different blowing ratios was studied,and the effect of different groove structures under the same groove width and groove depth was studied.The results show that the transverse groove can make the downstream produce anti-kidney vortex pair,which inhibits the adverse effect of the renal vortex pair,and its cooling advantage is the most obvious under the medium and low blowing ratio.When the arc groove passes through the arc structure of its downstream groove wall,the Coanda effect will occur to produce an efficient cooling area,which improves the film adhesion.The stepped slot promotes the jet to produce two secondary flows on the downstream slot wall through the stepped structure,thereby increasing the spanwise flow of the gas film and increasing the gas film coverage area.

关 键 词：气膜冷却 横向槽 吹风比 数值计算 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程] V231.1[航空宇航科学与技术—航空宇航推进理论与工程]