Flame acceleration and onset of detonation in inhomogeneous mixture of hydrogen-air in an obstructed channel
Flame acceleration and onset of detonation in inhomogeneous mixture of hydrogen-air in an obstructed channel
复制标题
阻塞通道中氢气-空气不均匀混合物中的火焰加速和爆炸开始
DOI：
10.1016/j.ast.2022.107944
复制
发表时间：
2022-11
影响因子：
5.6
通讯作者：
Zhu Yuejin
中科院分区：
文献类型：
--
作者：
Zhao Xinyu;Wang Jiabao;Gao Longkun;Wang Xujiang;Zhu Yuejin
Flame acceleration (FA) and deflagration-to-detonation transition (DDT) in combustible premixed gases is a complex process involving the flow and combustion phenomena. Practically, the combustible premixed gases are often inhomogeneous. The numerical study aims to explore the effects of different solid obstacle distribution patterns on the FA and DDT process in the inhomogeneous concentration field. Results show that the shape of detonation wave is arc-shaped due to the inhomogeneous hydrogen concentration, and the detonation initiation process can be classified into three types: i) detonation induced by the coupling of the flame surface and the high-pressure zone; ii) detonation induced by the interaction between flame surface and reflected shock wave; iii) detonation induced by the interaction between the oblique shock wave or Mach stem and obstacles in the flow field. Also, this study finds that the flame evolutions have experienced four velocity augmentation regions before the detonation initiation. Further, the rich hydrogen content in the aperture and the higher unilateral blockage ratio can both promote flame acceleration, and further shorten the run-up time of the DDT.
登录
查看更多内容
影响因子：
5.6
作者：
Qiu, Hua;Xiong, Cha;Yan, Chuan-jun;Zheng, Long-xi
通讯作者：
Zheng, Long-xi
化学动力学对甲烷/空气中温度梯度起爆的影响
DOI：
10.1016/j.combustflame.2018.08.017
发表时间：
2018-10
期刊：
Elsevier
影响因子：
--
作者：
Cheng Wang;Chengeng Qian;JianNan Liu;Michael A. Liberman
通讯作者：
Michael A. Liberman
DOI：
10.1016/j.actaastro.2010.05.024
发表时间：
2010-10
期刊：
--
影响因子：
--
作者：
M. Liberman;M. F. Ivanov;A. Kiverin;Mike Kuznetsov;A. Chukalovsky;T. Rakhimova
通讯作者：
M. Liberman;M. F. Ivanov;A. Kiverin;Mike Kuznetsov;A. Chukalovsky;T. Rakhimova
影响因子：
2.2
作者：
T. Obara;T. Kobayashi;S. Ohyagi
通讯作者：
T. Obara;T. Kobayashi;S. Ohyagi
DOI：
10.1016/s0082-0784(98)80487-6
发表时间：
1998
期刊：
--
影响因子：
--
作者：
H. Weller;G. Tabor;A. Gosman;C. Fureby
通讯作者：
H. Weller;G. Tabor;A. Gosman;C. Fureby