涡轮导叶吸力面气膜冷却掺混损失全三维分析  

Total Three-dimensional Analysis of Mixing Loss due to Film Cooling in the Suction Surface of Turbine Guide Vane

作　　者：王晨枫 李国庆[1,3,4] 白晓辉 李年强 张燕峰 卢新根[1,3,4] WANG Chenfeng;LI Guoqing;BAI Xiaohui;LI Nianqiang;ZHANG Yanfeng;LU Xingen(Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 100049,China;National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine,Beijing 100190,China;School of Engineering Science,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]江苏大学流体机械工程技术研究中心,镇江212013 [3]中国科学院大学航空宇航学院,北京100049 [4]轻型涡轮动力全国重点实验室,北京100190 [5]中国科学技术大学工程科学学院,合肥230027

出　　处：《工程热物理学报》2025年第1期104-113,共10页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51976214,No.52376038);国家科技重大专项(No.J2019-II-0002-0022)。

摘　　要：针对现有气膜冷却掺混损失评估方法无法准确计算通道二次流影响区域内的主流冷气掺混损失的问题,本文建立了一种全三维掺混损失计算方法,基于HS1A涡轮导叶,在吸力面设置具有不同复合角的气膜孔以保证气膜冷却效率要求,进一步通过控制主流与冷气参数分析了损失机理。该评估方法以掺混熵增作为损失评估依据对不同模型进行分析,结果表明:在吸力面气膜孔设置分区域复合角在提升气膜冷却效率的同时将增加掺混熵增。通过设置复合角可以减少二次流引起气膜偏转的损失以及气膜脱离产生的损失。A total three-dimensional method for calculating mixing loss is proposed in response to the problem that existing methods for evaluating the mixing loss of film cooling cannot accurately calculate the loss between mainstream and coolant in the area affected by passage secondary flow.Film holes with different compound angles are set in the suction surface based on HS1A turbine guide vane.Under the premise of meeting the requirements from film cooling effectiveness,the loss mechanism is analyzed by controlling the mainstream and coolant parameters.Different models are analyzed by using the entropy creation of mixing as the basis for loss evaluation.The results show that film cooling effectiveness is improved by arranging subregional compound angle holes with entropy creation of mixing increasing.And the loss of film deflection caused by passage secondary flow and film detachment can be reduced by setting compound angles.

关 键 词：气膜冷却 掺混损失 冷却效率 二次流 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]