采用圆弧模型,测量了旋转状态下凸表面气膜冷却效率ηad和换热系数hf的分布规律,重点研究旋转数Rt=ωD/u∞对气膜冷却的影响.叶片表面温度采用先进的液晶测温技术进行测量.结果表明:①在旋转离心力和哥氏力的共同作用下,气膜轨迹向高半径方向发生了明显的偏移,并且转速越高偏移角度越大;②旋转使得气膜冷却效率降低,换热系数上升;③在旋转状态下,气膜发生了分离再附壁的现象. The circular arc model was used to measure the distribution of the film cooling efficiency ηad and the heat transfer coefficient hf under the rotating condition, and the influence of the rotation number Rt = ωD / u∞ on the film cooling was mainly studied.The surface temperature of the blade was measured by the advanced liquid crystal Temperature measurement technique.The results show that: (1) The gas film trajectory shifts to the high radius direction with the combination of rotational centrifugal force and Coriolis force, and the higher the rotational speed, the larger the offset angle; (2) The film cooling efficiency decreases, the heat transfer coefficient increases; ③ In the rotating state, the separation of the gas film attached to the wall phenomenon.