分腔流量比对涡轮曲端壁表面冷却特性实验

The effect of mass flow ratios different on the film cooling effectiveness of the enwall is studied using the Pressure-Sensitive Paint (PSP) technology and high-speed wind tunnel. The detailed distribution of the film cooling effectiveness on the endwall surface under different flow ratios of each cavity is obtained. The film cooling effectiveness on the endwall surface increases with the increase of the slot mass flow ratio. As the coolant injected into the slot increases, the coverage of the coolant on endwall surface becomes, cooling performance. As the coolant mass flow ratio of 2 increases, because the coolant from cooling holes liftoff from the wall surface to the excessively high speed. The influence of the mass flow ratio cavity 3 on the cooling effectiveness of the endwall is similar to that of cavity 2.