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以汽油 /空气两相混气为可爆混合物 ,采用汽油机点火系统和半导体高能点火系统 ,实验研究了不同点火频率对脉冲爆震室中不同位置脉冲爆震波压力的影响。结果发现 ,充满度大 ,产生的紊流强度大 ,有利于爆震波的形成 ;在大多数情况下 ,用低能量 (5 0mJ)的点火系统点火时 ,点火频率大于实际产生的爆震频率 ;用高能(1J)点火系统时 ,可缩短从爆燃向爆震转变 (DDT)的距离 ,易产生爆震 ,所得爆震波的峰值压力明显增大。所得结果可为脉冲爆震发动机的设计、爆震点火系统选型提供重要参考
The effect of different ignition frequency on the pulse detonation pressure at different positions in the pulse detonation chamber was experimentally studied with gasoline / air two phase mixture as explosive mixture and gasoline engine ignition system and semiconductor high energy ignition system. The results show that the intensity of turbulent flow is large, which is favorable for the formation of detonation wave. In most cases, the ignition frequency is greater than the actual detonation frequency when ignited with low energy (50mJ) ignition system. With a high-energy (1J) ignition system, the distance from the detonation to detonation transition (DDT) can be shortened, and detonation can easily occur. The peak pressure of the resulting detonation wave is obviously increased. The results obtained for the pulse detonation engine design, knock ignition system selection provides an important reference