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本文用环形不稳定性计算模型计算、分析了FY-20液体火箭发动机的切向高频燃烧不稳定性。其结果与热试车结果是一致的。根据所得结果,为此发动机中安装径向隔板的必要性提供了理论依据井对稳定性不佳的液体火箭发动机提出了具体改进步骤及一些有效措施。
In this paper, the annular instability calculation model is used to calculate the tangential high frequency combustion instability of the FY-20 liquid rocket engine. The result is consistent with the hot test results. According to the results obtained, this paper provides a theoretical basis for the necessity of installing a radial partition in the engine and puts forward specific improvement steps and some effective measures for a liquid rocket motor with poor stability.