中心进气旋转盘的冷却效果实验研究

对涡轮发动机热部件冷却的主要指标目的是使热部件的总体温度尽可能低和热部件内部的温差尽可能小，因此对涡轮发动机涡轮盘的冷却除研究转盘表面的对流换热系数外，还应对以上两个指标进行研究。本文将发动机的涡轮盘简化成中心进气施转盘模型，用实验的方法研究了旋转雷诺数、进气雷诺数、盘罩间隙比和出气间隙比对转盘无量钢过余体平均温度和无量纲径向温差的影响，并给出了相应的准则关系式。

Experimental Study of the Cooling Effectiveness of a Rotating Disc with a Central Cooling-air Feed

With regard to the cooling of turbine engine high temperature components it is e ssential to meet the following main requirements: a minimal overall temperature of the hot components and a minimal temperature difference within the various pa rts of the hot components. In view of the foregoing one has to address the above cited main requirements in addition to the study of convection heat transfer f a ctor of the disc surface. In the present paper an engine turbine disc has been s implified to a rotating disc model with a central cooling air feed. Under this s implification an experimental study is conducted of the effect of rotating Reyno lds number, air inlet Reynolds Number, disc cowl clearance ratio and outlet air clearance ratio on the non dimensional excessive body average temperature and n o n dimensional radial temperature difference. In addition, a relevant criterion relation has also been given in the paper.