涡轮叶栅端壁表面换热系数的测量  

EXPERIMENTAL MEASUREMENT OF HEAT TRANSFER COEFFICIENTS OVER THE ENDWALL SURFACE OF A TURBINE CASCADE

作　　者：董志锐[1] 刘松龄[1] 杨林 许都纯[1] 

机构地区：[1]西北工业大学航空动力与热力工程系,陕西西安710072

出　　处：《航空学报》2000年第5期437-438,共2页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金 !(5 9476 0 11) ;航空基础科学基金!(98c5 30 2 7)资助项目

摘　　要：在大尺寸低速开式叶栅传热风洞中对一种高压涡轮导向叶片构成的直叶栅通道端壁表面的换热特性进行了试验研究。在雷诺数为 750 0 0～ 30 0 0 0 0的范围内 ,采用热膜法测量了端壁换热系数的分布 ,研究了Re数对叶栅端壁换热的影响规律 ;同时给出了端壁平均 St数与来流Experimental investigation of heat transfer characteristics on the endwall of a linear cascade was carried out in a large scale low speed open loop heat transfer wind tunnel. The distribution of local heat transfer coefficients on the endwall was measured by using the heat film method. Test Reynolds number based on inlet velocity and the chord length of the blade ranged from 75 000 to 300 000. The influence of Reynolds number on heat transfer on the endwall without film cooling was studied. The dimensionless correlation between St number and Re number based on endwall average values is provided.

关 键 词：涡轮叶栅 端壁换热 换热系数 涡轮冷却 风洞 

分 类 号：V211.753[航空宇航科学与技术—航空宇航推进理论与工程] V233.5