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实际发动机的气冷涡轮盘结构被简化成具有中心进气的旋转盘模型,以实验方法研究了旋转雷诺数Re、进气流量系数Cw、间隙比G和出气间隙比Gs对旋转盘表面平均换热特性的影响。在本实验范围内,Re较大时,它对盘面的Nu有较为明显的影响;Cw的增大会提高转盘表面的换热能力;G和Gs对盘面的Nu影响较小。根据实验结果给出了一个计算旋转盘表面平均对流换热系数的经验关系式。
The actual engine air-cooled turbine disk structure is simplified into a rotating disk model with central air intake. Experimental Reynolds number Re, inlet flow coefficient Cw, clearance ratio G and air gap ratio Gs are averaged on the surface of the rotating disk Effect of thermal characteristics. In the range of this experiment, when Re is large, it has obvious effect on the Nu of the disk. The increase of Cw will increase the heat exchange ability of the surface of the turntable; the effect of G and Gs on the Nu of the disk is small. Based on the experimental results, an empirical formula for calculating the average convective heat transfer coefficient on a rotating disk surface is given.