指式封严结构中气流流动与传热特性分析

研究了指式封严结构中气流流动与传热特性。将封严组片区域视为多孔介质，以摩擦热为热源，建立计算模型。计算结果表明：封严区域最高温度出现在指尖靴后部与转子摩擦接触面；在压差和转速一定时，封严区域最高温度随安装过盈量的增大而升高；在过盈量和压差一定时，最高温度随转子转速的增大而升高；但随着压差的增大，结果与之相反。研究结果可为指式封严的结构设计和接触副材料选择和安装方式提供参考。

Analysis of Air Flow and Heat Transfer Characteristics in Finger Seal Structure

The characteristics of air flow and heat transfer in finger seal structure was studied.The calculation model was built by the seal group area as porous media and heat source as frictional heat.The calculation results show that the maximum temperature of the seal area occurs in the contacting surface between finger-boots and rotor.The maximum temperature increases with the increased interference while differential pressure and speed;the maximum temperature decreased,while differ pressure increase in the inte...