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为了研究两点火源顺序点火对爆震起爆的影响,对单点火源以及不同间距、不同点火间隔时间的两点火源点火起爆过程进行了数值模拟。采用恰当比的丙烷/空气为可爆混合物。计算结果表明,在单个点火源不能起爆爆震波时,在其下游一定距离的位置增加一个相同能量的点火源并在适当的点火间隔时间下顺序点火可以起爆爆震波;两个点火源的距离一定时,点火间隔时间需在一定范围内才能成功起爆爆震波;当点火源距离从50mm增加到150mm时,成功起爆爆震波的点火间隔时间的范围从10μs减小到0.5μs。
In order to study the effect of two ignition sources on the initiation of detonation, the ignition process of two ignition sources with single ignition source, different pitches and different ignition intervals was numerically simulated. Use a suitable ratio of propane / air as an explosive mixture. The calculation results show that when a single ignition source can not detonate a detonation wave, an ignition source of the same energy is added at a certain distance downstream of the ignition source and the detonation wave can be detonated sequentially with an appropriate ignition interval; the distance between two ignition sources When the ignition source distance increases from 50mm to 150mm, the range of the ignition time of successful detonation wave is reduced from 10μs to 0.5μs.