某型号燃气发生器燃烧稳定性分析

摘要

To meet the needs of designing a credible gas generator for a liquid rocket, this paper studied the stability of each design project through simulating the gas generator's working.Firstly,the numerical models were set up by the combustor characteristic of the gas generator.After the simulations, low frequency stability analysis were carried for each kind of instability combustion.The results shows;This numerical model can give fine parameters per- estimate for the gas generator.Increasing oxygenic injection pressure and shortening oxygenic combustion time lag are effective methods to improve the gas generator stability.%为对某型号液体火箭发动机的燃气发生器提供可靠的设计方案,对燃气发生器各种设计方案的工作过程进行了数值仿真及稳定性能研究.根据燃气发生器的特点对该燃烧室进行了数学建模和数值仿真,针对不稳定燃烧的类型对该型号燃气发生器进行了低频稳定性分析.结果表明:数学模型能够很好地对燃气发生器工作过程中各物理参数进行预估;通过提高氧的喷注压降、减小氧的燃烧时滞等方法可以有效地提高该型号的燃气发生器的工作稳定性.