为探究旋流冷气的气膜冷却机理，采用数值计算的方法分析了无旋、顺时针冷气旋流和逆时针冷气旋流下平板气膜冷却流场的冷却效率和涡系结构。研究结果表明，冷气旋流会影响肾形涡对的对称性，可以使整体气膜冷却效率提高约19.2%-20.8%；当进一步采用复合角气膜孔时主流会破坏肾形涡对，形成单涡结构，与无复合角无旋的冷气模型相比，冷却效率提高了约101%；此时，逆时针冷气旋流增强了单涡强度，冷却效率进一步提升；顺时针冷气旋流促进了反肾形涡对的形成，能够显著提高冷却效率，与无复合角无旋冷气模型相比，顺/逆时针冷气旋流分别能将冷却效率提高180.8%和122.3%。

In order to explore the cooling mechanism of the air film of swirling coolant flow, the cooling efficiency and vortex structure of the flat film cooling flow field under the spiral-free, clockwise swirling coolant and counterclockwise swirling coolant flow were analyzed by numerical calculation. The results show that the swirling coolant flow can affect the symmetry of the kidney-shaped vortex pairs, which can increase the overall air film cooling efficiency by about 19.2%-20.8%; when further adopting the composite angular air film holes, the main stream will destroy the kidney-shaped vortex pairs and form a single vortex structure, which is about 101% higher than the cold air model without compound angle and spin-free. Compared with the non-compound angle and spin-free model, the clockwise swirling coolant and counterclockwise swirling coolant can increase the cooling efficiency by 180.8% and 122.3%.

TK14

国家科技重大专项