Abstract: A numerical algorithm for radiation angle factor of the complex geometry consisted of four diagonally arranged nozzles was studied and some typical computation results were presented.Based on two coordinates and coordinate transformation,the algorithm has the merit of low computation burden and high code efficience.This provides a preparation for thermo feasibility analysis of the concept of orbit maneuvering flight propelled by four parallel connected engines with little space.

Key words: Liquid propellant rocket engine;Engine nozzle;Nozzle heat transfer calculation;Coefficient of radiational heat exchange

摘要： 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。

关键词: 液体推进剂火箭发动机;发动机喷管;喷管传热计算;辐射换热角系数