基于结构参数分析的姊妹孔气膜冷却性能研究

A three-factor and five-level orthogonal table is designed using the Taguchi method for the sister hole structure, with the compound angle, the inclination angle and the blowing ratio as factors and the average wall film cooling effectiveness as the evaluation index. The flow characteristics and the cooling effectiveness distribution under different conditions are analyzed with numerical calculations. Results show that the film cooling effectiveness of the sister holes is 165%-412.5% of that of conventional cylindrical holes at a high blowing ratio, and the film cooling effectiveness of the sister holes with a 10° compound angle is higher than that of the sister holes with a -10° compound angle. Parameterized results reveal that the hole structure with a blowing ratio of 0.5, a compound angle of 10° and an inclination angle of 35° exhibits the best cooling performance.