中文摘要：

实验叶栅采用GE-E^3进口导叶叶型,进口马赫数为0.1,进口雷诺数为1.48×10^5。实验中的叶片放大比例为1.95,气膜有效度采用压力敏感漆测量。气膜冷却工质采用氮气,密度比接近1.0。实验中两个相邻叶栅通道的端壁气膜有效度分布同时进行测量,在端壁上游和下游分别取相同位置进行气膜有效度对比。进口旋流采用旋流器进行模拟,旋流器与两个叶栅通道间的相对位置沿周向移动,分别模拟正对叶片A、正对叶栅通道1,正对叶片B,正对叶栅通道2以及正对叶片C五个状态。通过实验可以发现,进口旋流可以主导端壁上游的气膜冷却有效度分布,气膜附面特性并且随旋流核心位置变化明显。在端壁下游区域旋流的影响主要表现为与主流横向流动的合成作用,气膜冷却变化对旋流核心位置移动相对上游不敏感。

英文摘要：

The GE-E^3airfoil is used in the cascades,with a scaled-up factor of 2.2.The inlet Reynolds number is 1.48×10^5and the Mach number is 0.07.Adiabatic film-cooling effectiveness is probed by using pressure-sensitive painting（PSP）.The coolant is simulated by nitrogen by which a density ratio of around 1.0 can be achieved.The double passages are investigated simultaneously by which the film cooling effectiveness can be compared in the same case at endwall surface.The inlet rotating flow is simulated by upstream swirler at the inlet,with five relative positions along pitchwise direction.They are Vane A aligned,Passage 1 aligned,Vane B aligned,Passage 2 aligned and Vane C aligned.According to the experimental results,the inlet rotating flow can dominate the film cooling effectiveness distribution at Endwall.The averaged film cooling effectiveness changes substantially with the change in swirler position.The effect of the rotating flow at endwall region is mainly interacted with the main flow to cause the change in incidence angle.The influence of the inlet rotating flow is more obvious at upstream part.Meanwhile the downstream is not as sensitive to rotating flow as upstream part.