Influence of concentration gradient on detonation re-initiation in a bifurcated channel
Influence of concentration gradient on detonation re-initiation in a bifurcated channel
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浓度梯度对分叉通道内爆轰重起的影响
DOI：
10.1016/j.fuel.2021.121895
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发表时间：
2022-01
期刊：
影响因子：
7.4
通讯作者：
Quaye E. K.
中科院分区：
文献类型：
--
作者：
Jiang Chao;Pan Jianfeng;Zhu Yuejin;Li Jianxing;Chen Huilong;Quaye E. K.
采用基于OpenFOAM的求解器DCRFoam，数值研究了浓度梯度对氢氧混合物分叉管内爆轰二次起爆行为的影响。采用含详细化学动力学的Naiver-Stokes方程（NS）模拟爆轰波的衍射、猝灭和再起爆过程。结果表明，与均质情况相比，浓度梯度混合物中爆轰波的二次反射是爆轰波成功二次起爆的关键，而不是一次反射，因为二次反射产生了多个横波。随着浓度梯度的增大，横波的数量和强度减小，导致胞状结构更加不规则，爆速降低。第二次反射后，由于浓度梯度与先导激波的相互作用，导致浓度梯度不仅在横向上存在，而且在纵向上也存在。纵向浓度为横向爆轰的形成和传播提供了较早的H2。浓度梯度越陡，马赫干前缘弯曲越大，从规则反射到马赫反射的过渡距离越大。
The effect of concentration gradient on detonation re-initiation behavior in a bifurcated tube full of oxyhydrogen mixture is numerically studied by employing an OpenFOAM based solver DCRFoam. The Naiver-Stokes equations (NS) with detailed chemical kinetics are solved to model the detonation diffraction, quenching and re-initiation process. The results show that compared with the homogeneous case, the second reflection is the key to the successful re-initiation of the detonation in mixture with concentration gradient instead of the first one, because multiple transverse waves are generated during the second reflection. With steepening the concentration gradient, the number and intensity of the transverse waves decreases, leading to the cellular structure more irregular and the decrease of detonation velocity. After the second reflection, the interaction between the concentration gradient and the leading shock leads to the concentration gradient existing not only in the transverse direction but also in the longitudinal direction. The longitudinal concentration provides the earlier H2for the formation and propagation of transverse detonation. Also, the Mach stem front bends greatly, and the transition distance from regular reflection to Mach reflection increases with steepening the concentration gradient.
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影响因子：
2.2
作者：
L. R. Boeck;F. Berger;J. Hasslberger;T. Sattelmayer
通讯作者：
L. R. Boeck;F. Berger;J. Hasslberger;T. Sattelmayer
影响因子：
3.7
作者：
Wenhu Han;Cheng Wang;Chung K.Law
通讯作者：
Chung K.Law
影响因子：
4.4
作者：
Changming Guo;Changjian Wang;Shengli Xu;Hanhong Zhang
通讯作者：
Changming Guo;Changjian Wang;Shengli Xu;Hanhong Zhang
DOI：
--
发表时间：
2010
期刊：
--
影响因子：
--
作者：
F. Ettner;K. G. Vollmer;T. Sattelmayer
通讯作者：
F. Ettner;K. G. Vollmer;T. Sattelmayer
影响因子：
4.4
作者：
Praveen Honhar;C. Kaplan;R. Houim;E. Oran
通讯作者：
Praveen Honhar;C. Kaplan;R. Houim;E. Oran