IMECH-IR  > 高温气体动力学国家重点实验室
On the mechanism of detonation initiations
Jiang ZL(姜宗林); Teng HH(滕宏辉); Zhang DL(张德良); Khomik SV; Medvedev SP; Jiang, Z (reprint author), Chinese Acad Sci, Inst Mech, LHD, Beijing 100080, Peoples R China.
Source PublicationSHOCK WAVES, VOL 1, PROCEEDINGS
2009
Conference Name26th International Symposium on Shock Waves
Conference DateJUL 15-20, 2007
Conference PlaceGottingen, GERMANY
AbstractTwo essential issues in detonation initiations were discussed in this paper, that is, hotspots and reaction zone acceleration. By defining the reaction zone acceleration, the hotspot and the reaction zone acceleration are identified as the primary mechanisms underlying the deflagration to detonation transition. The dominant physical process for two mechanisms is the interaction between gasdynamic non-linearity and chemical reactions that are very sensitive to temperature gradient. In the process, spontaneous waves are generated in the reaction zone, propagate with the local sound speed, decelerate suddenly in the front of the reaction zone because of the sharp temperature gradient, and develop into a pressure pulse acting to elevate the gas temperature that will further induce more intensive chemical reactions. Such a positive feedback loop supports detonation initiation and propagation.
WOS IDWOS:000269686200052
ISBN978-3-540-85167-7
URL查看原文
Indexed ByCPCI-S
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58886
Collection高温气体动力学国家重点实验室
Corresponding AuthorJiang, Z (reprint author), Chinese Acad Sci, Inst Mech, LHD, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
Jiang ZL,Teng HH,Zhang DL,et al. On the mechanism of detonation initiations[C]SHOCK WAVES, VOL 1, PROCEEDINGS,2009.
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