应用瞬态液晶测量技术研究层板内部换热特性  

Research on heat transfer characteristic of lamilloy internal surfaces using transient liquid crystal technique

作　　者：孔满昭[1] 朱惠人[1] 原和朋[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《航空动力学报》2009年第2期340-346,共7页Journal of Aerospace Power

基　　金：国家"973"项目(2007CB707701)

摘　　要：应用窄带瞬态液晶测量技术对放大型层板结构的内壁面(靶面、冲击面、扰流柱面)进行了详细的换热系数测量.由获得内表面换热系数分布来深入分析复杂层板结构内部强化换热机理.实验研究结果表明:应用先进瞬态液晶测量技术能够获得复杂层板结构内部表面的换热系数分布,获得信息量大;层板内表面换热系数随着冲击雷诺数的增大而线性增加;内表面平均换热系数随着通道高度增加而减小.Experiment was carried out to describe the hear transfer coefficient distribution of inner surfaces （target plate, impingement plate and pins） of large scale lamilloy configuration model by utilizing the narrow-band transient iiquid crystal technique （TLC）. The mechanism of heat transfer intensification was also interpreted, The result shows that. heat transfer coefficient distribution of inner surfaces of lamilloy can be obtained by using the TLC technique and more detail information are also available; heat transfer coefficient of inner surface is linearly increased with growing Reynolds number and gradually reduced with the higher channel.

关 键 词：瞬态窄带液晶 涡轮叶片 层板 换热系数 扰流柱 

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]