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为探讨旋转状态下气膜冷却的效果,在不同吹风比和旋转数下,对带有气膜冷却的涡轮叶片进行三维数值模拟,研究了旋转效应对叶片表面冷却效率的影响。结果表明,当叶片旋转时,压力面上的冷却效率增大,吸力面上的冷却效率降低。叶片表面气膜冷却效果随着旋转数的增加而下降。旋转效应对叶片表面冷却效果的影响程度依赖于吹风比。当吹风比增大时,气膜冷却效果随着旋转数的增加而下降的趋势增大。
In order to investigate the effect of film cooling under rotating condition, the three-dimensional numerical simulation of the turbine blade with film cooling was carried out under different blowing and rotating speeds, and the effect of rotating effect on the cooling efficiency of the blade surface was studied. The results show that when the blade rotates, the cooling efficiency on the pressure surface increases, and the cooling efficiency on the suction surface decreases. The cooling effect of the film on the blade surface decreases with the increase of the number of rotations. The effect of rotation on the cooling effect on the blade surface depends on the blowing ratio. When the blowing ratio increases, the cooling effect of the film tends to decrease as the number of revolutions increases.