Effect of transversal concentration gradient on H_2–O_2 cellular detonation
Effect of transversal concentration gradient on H_2–O_2 cellular detonation
复制标题
横向浓度梯度对 H2-O2 细胞爆炸的影响
DOI：
10.1088/1674-1056/ab81f5
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发表时间：
2020
影响因子：
1.7
通讯作者：
Song Qingguan
中科院分区：
文献类型：
--
作者：
Wang Cheng;Wu Yixuan;Huang Jin;Han Wenhu;Song Qingguan
采用精细化学模型，采用空间离散的五阶加权基本无振荡格式(WENO)和时间离散的三阶加性龙格-库塔(Runge-Kutta)格式，对H_2-O_2体系的二维爆轰过程进行了高分辨率数值模拟。研究了浓度梯度对蜂窝爆轰的影响。结果表明，随着浓度梯度的增加，爆轰的胞体不稳定性增加，并引起平均爆速的振荡。在较长时间后，对于较低梯度的情况，爆轰可持续。多头模式和单头模式交替，而对于较高的梯度，它以单头模式传播。
A two-dimensional detonation in H_2–O_2 system is simulated by a high-resolution code based on the fifth-order weighted essentially non-oscillatory (WENO) scheme in the spatial discretization and the 3th-order additive Runge–Kutta schemes in the time discretization,by using a detailed chemical model.The effect of a concentration gradient on cellular detonation is investigated.The results show that with the increase of the concentration gradient,the cell instability of detonation increases and gives rise to the oscillation of average detonation velocity.After a long time,for the case of the lower gradient the detonation can be sustained,with the multi-head mode and single-head mode alternating,while for the higher gradient it propagates with a single-head mode.