致密微孔壁复合冷却对流换热系数研究  

STUDY OF CONVECTIVE HEAT TRANSFER COEFFICIENT OF EFFUSION COOLING

作　　者：陈焱[1] 吉洪湖[1] 胡娅萍[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《工程热物理学报》2005年第3期489-491,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50076017)

摘　　要：本文采用数值模拟的方法研究了吹风比M和孔阵排列偏转角γ对致密微孔壁复合冷却热侧壁面上对流换热系数的影响。分析比较了在M=0.50-2.0、γ=10°-35°几种情况下的对流换热系数。结果表明:M越大,对流换热系数越低。在气膜孔区内的上游部分γ对斜排对流换热系数影响不很明显,在中下游部分斜排模型的对流换热系数比常规错排模型低。The paper numerically investigates the influences of the blowing ratio M and the inclination angle γ of the arrangement of the hole array on the convective heat transfer coefficient on the hot side of an effusion-cooled plate. Several cases are studied which cover a range of M from 0.50 to 2.0 and γ from 10° to 40.53°. The results show that the convective heat transfer coefficient reduces with the increase of M. The influence of γ on the heat transfer coefficient is not obvious in the upstream part within the hole region, whereas in the other part within the hole region the heat transfer coefficient of the inclined array is lower than that of the staggered array.

关 键 词：致密微孔壁冷却 对流换热系数 吹风比 偏转角 

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]