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某型发动机的实际涡轮盘腔冷却结构被简化成外缘轴向进气的旋转空腔模型,以实验方法研究了旋转雷诺数(Reω)、冷气雷诺数(Rez)、哥拉晓夫数(Gr*)对主盘局部换热及流阻特性的影响。实验发现,冷气雷诺数、哥拉晓夫数的增大,使主盘局部换热系数在盘缘附近迅速增大,而在接近盘心时出现负值。阻力系数随旋转雷诺数的增大而减小,随冷气雷诺数的增大而增大。
The actual turbine disk cooling structure of a certain type of engine is simplified into a rotating cavity model with axial inlet air in the outer rim. Experimental Rex, Rez, Gr *) on the main plate local heat transfer and flow resistance characteristics. The experimental results show that the Reynolds number of the air-conditioners and the increase of the number of the Gorachsvows increase the local heat exchange coefficient of the main plate rapidly around the rim of the main plate, while the negative value appears near the plate core. The drag coefficient decreases as the rotational Reynolds number increases, and increases with the Reynolds number of the cold air.