双辐板涡轮盘盘腔流动换热分析

Flow and heat transfer for rotating cavity of twin-web rotor disk

基于UG软件建立了双辐板涡轮盘的三维模型,基于CFX软件对双辐板涡轮盘盘腔内的流动换热现象进行了数值模拟,获得了典型工况下旋转盘腔内的流场和温度场分布,初步总结了该盘腔结构内的流动换热规律。结果表明:该盘腔结构内的流动形式为典型的源-汇流动,冷气的总压和温度沿径向均逐渐增大,总压增和温度差随转速的增加而增大、随冷气流量的增加而减小,对流换热系数在不同流场区域表现出不同的分布特征。为双辐板涡轮盘的进一步结构优化设计提供了参考。

The three dimensional model was established with UG, the flow and heat transfer were simulatedwith CFX, the flow field and temperature field in typical working status of the rotating cavity for twin-webrotor disk were calculated and the conclusions of flow and heat transfer of rotating cavity were summarized.The results show that the flow structure in the rotating cavity is source-sink flow, total pressure and temper-ature of the cooling gas gradually increase along the radial direction; their increment increase with rotatingspeed and decrease with mass flow rate and heat transfer coefficient has different distributional features indifferent flow regions, which supports the further optimized design of structure for twin-web rotor disk.