发散冷却模型试验件换热系数试验研究  

Experimental investigation of heat transfer coefficient measuring on effusion cooling model samples

作　　者：程波[1] 范珍涔[1] 刘堃[1] 徐华胜[1] 

机构地区：[1]中国燃气涡轮研究院,成都610500

出　　处：《燃气涡轮试验与研究》2015年第6期31-33,60,共4页Gas Turbine Experiment and Research

摘　　要：在模拟航空发动机火焰筒冷却孔相对压降条件下,采用动态法对火焰筒发散冷却模型试验件换热系数进行了测量,并介绍了其试验设备、试验原理及试验过程。通过测量三种单层发散冷却板及与之相配的双层壁发散冷却火焰筒模型试验件的换热系数,得出了主次流相对静压降、冲击高度、开孔率对火焰筒发散冷却性能的影响规律。试验结果同时证实,双层壁发散冷却结构在提高火焰筒冷却性能上具有一定优势。The test principle, test facility and measuring process of effusion cooling model samples on the condition of simulating the relative pressure drop of combustor liner cooling holes of aero-engine with dynamic method were introduced. After three single-wall effusion cooling boards and the corresponding combustor liner models with double-wall effusion cooling boards were measured for the heat transfer coefficient, the regularities of characteristic parameters on effusion cooling performance were obtained, such as the relative static pressure drop between main and secondary flow, impingement height and hole area ratio parameters. Also it is proved that double-wall effusion cooling construction is prior in the cooling performance of combustor liner.

关 键 词：航空发动机 火焰筒 发散冷却 换热系数 动态法 冲击高度 开孔率 

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]