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采用带化学反应的一维多相流模型,运用CE/SE数值计算方法和处理源项的四阶龙格-库塔方法对爆轰管内汽油/纳米铝粉悬浮液滴、空气混合物的多相爆轰过程进行了数值模拟,讨论了悬浮液滴中纳米铝粉浓度对爆轰参数及燃烧转爆轰过程的影响。数值结果表明,添加纳米铝粉后,稳定传播的爆轰波速度变大;随着纳米铝粉浓度的增加,爆轰波压力峰值与平台压力都增大,但两者增大的速率不同;DDT距离先缩短后增长,在体积浓度为1%附近有最短距离。
A one-dimensional multiphase flow model with chemical reaction was used to simulate the multiphase flow of gasoline / nanoaluminum suspension droplets and air mixture in the detonation tube by using CE / SE numerical method and the fourth-order Runge-Kutta method. The process of detonation was numerically simulated. The effect of nanoaluminum concentration in suspension droplets on the detonation parameters and the transition from detonation to detonation was discussed. Numerical results show that the velocity of detonation wave propagating steadily increases with the addition of nano-sized aluminum powder. With the increase of concentration of nano-aluminum powder, the peak pressure of detonation wave and the pressure of platform increase, but the rate of increase of the two is different. DDT distance shortened after the increase in the volume concentration of 1% near the shortest distance.