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为了研究尾喷管构型对多循环工况下非定常气液两相脉冲爆轰发动机推进性能的影响,运用适应能力强的非结构网格CE/SE(时空守恒元和求解元)方法数值研究了带尾喷管脉冲爆轰发动机的内外流场.结果表明:尾喷管对脉冲爆轰发动机性能的影响在单次循环和多循环工况下有显著差异;当燃料填充率为1、环境压力为0.1MPa时,完成一个周期各种构型尾喷管产生的平均推力由大到小依次为拉伐尔喷管、塞式收敛扩张喷管、收敛喷管、无喷管、直喷管;研究中塞式收敛扩张喷管可以提供最大的冲量和燃料比冲,但完成单个循环的周期最长.
In order to study the influence of tailpipe configuration on the propelling performance of unsteady gas-liquid two-phase pulse detonation engine under multi-cycle conditions, the CE / SE (space-time conservation and solution) method The internal and external flow fields of the pulse detonation engine with a tailpipe nozzle are studied.The results show that the influence of the tailpipe nozzle on the pulse detonation engine performance is significantly different under single cycle and multi-cycle conditions; when the fuel filling rate is 1, When the ambient pressure is 0.1MPa, the average thrust produced by tail pipe of various configurations in one cycle is Lavell nozzle, plug convergent expansion nozzle, convergent nozzle, no nozzle, direct injection In the study, the plug convergent expansion nozzle can provide the maximum impulse and fuel ratio, but the longest cycle to complete a single cycle.