双辐板涡轮盘盘腔单向流固耦合分析

为减轻质量、提高冷却效率,针对下一代高推重比涡扇发动机高压涡轮盘的优化设计,基于3维双辐板涡轮盘模型进行单向流固耦合分析,通过定常流动换热分析得到该结构盘腔中的流场、压力场和温度场分布,将盘腔表面压力分布和盘体上的温度分布作为载荷传递给盘体,对盘体进行应力分析得到应力场,从而建立起温度场和应力场的直接关联,总结出盘腔转速是影响盘体最大等效应力的关键参数,为双辐板涡轮盘的冷却设计和结构优化提供了数据支撑。

Analysis on One Way Fluid-Structure Interaction of Rotating Cavity for Twin-Web Rotor Disk

In order to reduce the weight and improve the cooling efficiency of the next generation of high thrust to weight ratio turbofan engine, considering the high pressure turbine disk optimizing design, a one way fluid-structure interaction analysis was performed based on three dimensional model of twin-web rotor disk, and the flow field, pressure field and temperature field distribution were obtained by steady flow and heat transfer analysis. Then the pressure distribution of cavity surface and temperature distribution of structure were transferred to the disk, stress distribution was then obtained with finite element analysis, which established the direct correlation between temperature and stress. As a result, rotating speed is the key parameter to the max equivalent stress. Current research firmly supports the cooling design and structural optimization of twin-web rotor disk