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基于化学非平衡流解耦方法和详细化学反应机理,在0.1mm的网格尺度下对连续旋转爆震波内流场和爆震波平掠惰性气体界面的传播过程进行了数值模拟。详细分析了连续旋转爆震波的空间结构,由于在出口侧无几何约束,受一系列稀疏波的影响,旋转爆震波强度受到不同程度的削弱,形状也发生了相应的变化。爆震波平掠惰性气体界面时的流场分布与连续旋转爆震波结构极为类似,对比研究了波前可燃气体层高度对爆震波结构和传播过程的影响,当爆震波高度较小时,其抵御惰性气体侧稀疏波衰减的能力弱,波阵面严重变形,爆震波解耦。若爆震波要稳定自持传播,其必须要达到一定的临界高度来抵御稀疏波的影响。
Based on the chemical non-equilibrium flow decoupling method and the detailed chemical reaction mechanism, the numerical simulation of the propagation of continuous rotary detonation wave and inertial gas interface of detonation wave at 0.1 mm grid scale is carried out. The space structure of continuous rotary detonation wave is analyzed in detail. Due to the non-geometric constraints on the outlet side, the strength of the rotary detonation wave is weakened to some extent and the shape changes correspondingly due to a series of sparse waves. The distribution of the flow field at the interface of the detonation wave at the flat swept inertial gas interface is very similar to that of the continuous detonation wave structure. The influence of the height of the combustible gas layer on the detonation wave structure and propagation process is studied. When the detonation wave height is small, Gas-side sparse wave attenuation weak ability, the wave front serious deformation, detonation wave decoupling. If a detonation wave is to be stable and self-sustaining, it must reach a certain critical height to resist the effects of the sparse wave.