【摘要】 本文采用传质实验的方法,对叉排双排离散孔在凸表面上的气膜冷却特性,做了精确地测量,以大量实验数据为依据,总结出在凸表上气膜冷却有效温比分布特征,为设计者提供了有实际参考价值的依据。更多还原

【Abstract】 The distribution of film cooling effectiveness for staggered double-row discrete holes has been measured extensively over the whole area of convex surface. It has been found that whether or not the blowing ratio of first row is equal tothat of the second one, higher blowing ratio causes stronger separation of the film jet, the cooling effect is thus reduced remarkably, and the optimized value of the blowing ratio for better film cooling effectiveness is M≤0.5.Experimental results show that for convex surface the blowing ratio of first row should be smaller than that of second row in order to get better cooling results, for example Mf=0.3. The distance between cooling holes as well as the blowing ratio M should be both smaller on the convex surface.更多还原