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基于流固耦合完成复合喷管流动换热、传热过程温度场的数值模拟,编写了计算流体动力学(CFD)与有限单元法(FEM)的接口程序,快速实现温度载荷和机械载荷数据的传递,提出了复合喷管热结构耦合计算一种策略.利用直接约束法考虑了复合喷管部件界面间高温碳化带来的边界非线性因素.计算结果表明耦合方法得到的复合喷管温度场是合理的,高温下界面间结构功能退化问题对于变形特征以及应力场影响很显著.
Based on the fluid-solid coupling, the numerical simulation of the temperature field in the heat transfer and heat transfer process of the composite nozzle was completed. The interface program of computational fluid dynamics (CFD) and finite element method (FEM) was programmed to quickly realize the temperature load and mechanical load data A new strategy for the coupling calculation of composite nozzle thermal structure was put forward.Using the direct constraint method, the boundary nonlinearity caused by high temperature carbonization at the interface of composite nozzle was considered.The calculation results show that the temperature field of the composite nozzle obtained by the coupling method is Reasonable, high temperature interfacial structural function degradation problem has a significant impact on deformation characteristics and stress field.