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用巴兹公式和发动机的热力计算数据,得到了推力室内的燃气壁面对流传热系数和燃气温度的分布,并用有限单元法计算了推力室的温度场.在温度场计算基础上,采用Wilson非协调单元,对推力室的应力场进行了计算,其中位移函数采用二阶形式,将计算精度提高到二阶.结果表明:相比常规单元,Wilson非协调单元在计算结构比较复杂,温度梯度比较大的结构时,精度比较高,结果合理.
Based on the Buzz formula and the thermodynamic calculation data of the engine, the convective heat transfer coefficient and gas temperature distribution of the gas wall in the thrust chamber are obtained, and the temperature field of the thrust chamber is calculated by using the finite element method. Based on the calculation of the temperature field, The coordination unit is used to calculate the stress field in the thrust chamber, and the displacement function is of the second order, which improves the calculation accuracy to the second order. The results show that compared with the conventional unit, the Wilson nonconforming unit has more complicated structure and temperature gradient comparison Large structure, the accuracy is higher, the result is reasonable.