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文中设计了两种新型旋流式固冲发动机补燃室掺混结构,对该掺混结构作用下补燃室掺混燃烧流场进行了数值研究。分析了旋流式掺混结构对补燃室中掺混燃烧的影响,并与两种基准补燃室掺混结构的计算结果进行了对比分析。结果表明:旋流式掺混结构能够强化补燃室中的掺混燃烧效果,大幅提升固冲发动机补燃室的特征速度,且补燃室总压恢复系数满足设计需求,但补燃室内的旋流流动在一定程度上会削弱冲压喷管的做功能力。
In this paper, two kinds of new-type mixing chamber with swirling solid impulse engine are designed and the numerical simulation is carried out. The influence of the swirling mixing structure on the blending combustion in the afterburning chamber was analyzed and compared with the calculated results of the two kinds of mixing structures. The results show that the swirling admixture structure can enhance the blending combustion in the afterburner, greatly improve the characteristic velocity of the afterburner in the solid impulse engine, and the total pressure recovery coefficient of the afterburner satisfies the design requirements. However, Swirling flow to a certain extent will weaken the stamping nozzle work capacity.