旋转平板型叶端气膜冷却实验研究

在相似理论指导下, 对旋转系流动与换热方程以及边界条件进行无量纲化, 得出了描述旋转气膜冷却效率与换热系数的一系列准则, 设计并建立了实验台, 解决了从高速旋转部件上引出测试信号而不失真及对旋转试件进行强电加热等问题, 并在旋转情况下, 对常用的平板型叶端气膜冷却效率及其换热系数进行了实验研究, 并总结出可供工程参考的准则公式. 

Experimental Study on Film Cooling at Rotating Flat Blade Tip

The governing conservation equations were non dimensionalized according to the theory of similarity, a series of analogous criteria were obtained to study rotating film cooling. The rotating components of film cooling were designed and set up. A series of problems, such as signal transfer between rotational and station systems without loss of accuracy, were trickled successfully. Extensive amount of experimental data were obtained to determin film cooling effectiveness and its heat transfer coefficient. The linearity of the heat transfer coefficient and dimensionless temperature ratio was driven. Experimental correlations of the film cooling effectiveness and its heat transfer coefficient at rotating flat blade tip were formulated.