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通过数值模拟,分析了低温推进剂(液氧)火箭发动机循环预冷系统中喷泉非稳现象的过程与机理;计算分析了不同影响因素下的喷泉现象及行为规律;同时,参照针对竖直立管的喷泉失稳边界Murphy曲线,对比探讨了输送管几何与保温参数影响下的自然循环预冷回路的喷泉稳定性边界;进一步地,针对特定循环预冷回路,数值分析并验证了消除喷泉效应的有效措施。
Through the numerical simulation, the process and mechanism of fountain instability in the circulation precooling system of rocket engine with low temperature propellant (liquid oxygen) were analyzed. The fountain phenomenon and behavior under different influence factors were calculated and analyzed. At the same time, And the Murphy curve of the fountain’s unstable fountain boundary, the fountain stability boundary of the natural circulation pre-cooling circuit under the influence of the geometry and heat preservation parameters of the transmission pipe was discussed. Furthermore, the fountain effect of the fountain effect Effective measures.