机械与电子Issue(7)：11-14,4.
内部横流对外部气膜冷却特性的影响
Effect of Internal Crossflow on Film Cooling Performance
摘要
Abstract
Different internal crossflow(Re Dh =50 000,100 000)have been compared to find out the effect on the external film cooling performance based on the model of smooth secondary flow chan-nel with crossflow.The local surface film cooling effectiveness and heat transfer coefficient were measured with a transient liquid crystal technique. Discharge coefficient of film hole has also been measured.With the increase of internal crossflow, discharge coefficient decreases,and heat transfer is enhanced.About the film cooling effectiveness, result of the small crossflow case is higher than the other case at Br = 0.5;at the contrary,film cool-ing effectiveness is higher at the stronger crossflow case,especially,the lateral average film cooling ef-fectiveness is about 180% higher than the case with Re Dh = 50 000.关键词
横流/气膜孔/流量系数/冷却效率/换热系数Key words
crossflow/film cooling hole/dis-charge coefficient/film cooling effectiveness/heat transfer coefficient分类
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骆剑霞,朱惠人,刘存良,贾广森..内部横流对外部气膜冷却特性的影响[J].机械与电子,2014,(7):11-14,4.基金项目
国家重点基础研究发展计划资助项目（2013CB035702）；国家自然科学基金资助项目 （）
