Thermal structure analysis of liquid rocket engine thrust chamber based on non-coordinated element

Heat exchange coefficient of gas in thrust chamber and distribution of gas temperature were obtained from Baz formula with data of thermal calculation,and the temperature of thrust chamber was calculated by finite element method.Based on calculation of temperature,the stress of thrust chamber was carried out by Wilson non-coordinated element,in which displacement function was quadratic form.The result shows that,compared with typical element,using Wilson non-coordinated element can get higher calculation precision and more reasonable result in the analysis of high temperature gradient and complex thermal structure of thrust chamber.