【摘要】 针对无扰流柱和有扰流柱结构进气方式下不同曲率半径表面缝形气膜孔，采用数值模拟方法研究了空气、蒸汽和液滴掺混等复合冷却工质对气膜冷却特性的影响。结果表明：当吹风比为1.0、1.5和2.0时，相比于平直表面缝形气膜孔，凸表面平均气膜冷却效率普遍较低，凹表面平均气膜冷却效率普遍较高，随曲率逐渐减小，冷却效率逐渐增加。冷却工质为空气与蒸汽掺混时，气膜冷却效率随蒸汽质量流量增加而增加。冷却工质为空气与液滴掺混时，与传统单工质纯空气相比，液滴质量百分数越大平均气膜冷却效率提升越多，但在同样质量百分数条件下，液滴直径并非越大越好。更多还原

【Abstract】 The effects of air, steam and droplet mixing on the film cooling characteristics were numerically simulated for the slit-shaped film holes on the curved surface with different curvature radii under the cooling inlet with/without pin fins structure. The results showed that compared with the flat surface, under the case of mass ratio equal to 1.0, 1.5 and 2.0, the average film cooling efficiency of the convex surface slot film hole was lower, and the average film cooling efficiency of the concave surface slot film hole was basically higher. With the decrease of curvature, the cooling efficiency gradually increased. When the cooling medium was air and steam mixture, the film cooling efficiency increased with the increase of steam mass flow rate. When the cooling air was mixed with droplets, compared with pure air, the average film cooling efficiency increased as the mass flow rate increased. Under the same mass flow rate of droplets conditions, the diameter of droplet was not necessarily better when bigger.更多还原