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研究了四对角喷管复杂几何体系幅射角系数的数值计算方法，并给出部分典型计算结果。基于两种坐标系和坐标变换的这一计算方法具有计算工作量小，代码效率高的优点，为小间距四发动机并联推进变轨飞行方案热可行性分析作好了准备。
The numerical calculation method of the radiation angle coefficient of complex geometric system of four diagonal nozzles is studied and some typical calculation results are given. The calculation method based on two kinds of coordinate system and coordinate transformation has the advantages of small computational load and high code efficiency, and is ready for the feasibility analysis of small-pitch four-engine parallel orbit flight orbit flight planning.