Abstract: According to the theory of heat radiation,the essential characteristic of outward radiation heat transfer of engine group was researched,and the necessary conditions for simulation research of this heat transfer phenomenon using nozzles,subscale component of electrically heated nozzles were given out to be simialr geometrically,and equal for heat flux q and emissivity ε on wall surface for the two.Feasibility analysis provides scientific basis for ground simulation test.Its conclusion can be used for guiding the test.

Key words: Rocket engine cluster;Engine nozzle,Ground simulation test;Radiative heat transfer;Feasibility study

摘要： 根据热辐射理论 ,分析空间发动机组外向辐射传热的基本特点 ,得出在地面用模型喷管———电热喷管缩比件模拟这一传热现象的必要条件为两者几何相似 ,壁面热流密度q以及表面黑度ε相等。可行性分析为地面模拟试验提供了科学的依据 ,其结论可用来指导试验。

关键词: 并联火箭发动机;发动机喷管;地面模拟试验;辐射传热;可行性研究