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利用松散耦合方法建立离心式压气机稳态流-热-固耦合模型,将离心式压气机解耦成气动、传热和结构三个子系统,子系统间存在热、力和变形的传递。由于不匹配的网格划分,利用反距离平均方法构造插值函数实现热与力向结构的传递,采用统一有限元模型实现热-固顺序耦合分析,利用网格重生成技术实现结构变形到气动分析模型的传递。经过3次迭代离心式压气机耦合系统达到收敛。结果表明,分析的离心式压气机内部流-热-固耦合强烈,耦合解法与非耦合解法得到压气机响应存在较大差异,对于多学科耦合强烈的构件,需要考虑学科间的耦合效应反应真实的工作状况。
The steady-state flow-heat-solid coupling model of a centrifugal compressor is established by using a loose coupling method. The centrifugal compressor is decoupled into three subsystems: aerodynamics, heat transfer and structure. The subsystems have the transfer of heat, force and deformation. Due to the unmatched meshing, the interpolation function is constructed by the inverse distance average method to transfer the heat and force to the structure. The thermal-solid sequential coupling analysis is carried out by the unified finite element model. The deformation of the structure is analyzed by aerodynamic analysis Model transfer. After three iterations of centrifugal compressor coupling system to achieve convergence. The results show that the coupled flow-heat-solid coupling is strong in the centrifugal compressor, and there is a big difference between the compressor and non-coupled solutions in the compressor response. For the multi-disciplinary coupling component, the interdisciplinary coupling reaction should be considered Working condition.