轨控发动机真空流场计算

拦截弹轨控发动机在真空中的流场可为其设计提供重要的理论依据，同时其喷焰红外辐射特性也是防御上的重要研究对象。采用基于有限体积形式的LU格式离散N-S方程，通过时间推进法求解拦截弹轨控发动机喷管以及外场喷流区域在内的气相统一流场，同时考虑了各主要组分参与的化学反应，得到了轨控发动机喷管内外速度、温度、密度、组分浓度等参数的分布情况。研究表明：使用本文中的方法可以很好地计算出轨控发动机在真空中的内外流场。真空羽流膨胀迅速。

Vacuum Flow Field Calculation of Divert Thruster

The vacuum flow-field of interceptor divert thruster is the important basis for designing. Its plume infrared is the important research object for defense. Discrete N-S equations based on finite volume LU format was used in this article. Timemarching method was adopted to calculate the whole flow-field inside interceptor divert thruster nozzle and its plume. In the mean while, the chemical reaction participate by some main components was considered. The inside and outside nozzle distributions of those parameters were obtained, such as velocity, temperature, density, components consistency etc. Research indicates that the method in this article can simulate the inside and outside flow field of nozzle in vacuum very well. The plume expand rapidly in vacuum.