Theoretical analysis on deflagration-to-detonation transition

doi:10.1088/1674-1056/27/8/084703

中国物理B ›› 2018, Vol. 27 ›› Issue (8): 84703-084703.doi: 10.1088/1674-1056/27/8/084703

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Theoretical analysis on deflagration-to-detonation transition

Yun-Feng Liu(刘云峰), Huan Shen(沈欢), De-Liang Zhang(张德良), Zong-Lin Jiang(姜宗林)

1 Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2017-12-26 修回日期:2018-03-29 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: Yun-Feng Liu E-mail:liuyunfeng@imech.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11672312 and 11532014).

Theoretical analysis on deflagration-to-detonation transition

Yun-Feng Liu(刘云峰)^1,2, Huan Shen(沈欢)^1,2, De-Liang Zhang(张德良)^1,2, Zong-Lin Jiang(姜宗林)^1,2

1 Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2017-12-26 Revised:2018-03-29 Online:2018-08-05 Published:2018-08-05
Contact: Yun-Feng Liu E-mail:liuyunfeng@imech.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11672312 and 11532014).

摘要/Abstract

摘要： The study on deflagration-to-detonation transition (DDT) is very important because this mechanism has relevance to safety issues in industries, where combustible premixed gases are in general use. However, the quantitative prediction of DDT is one of the major unsolved problems in combustion and detonation theory to date. In this paper, the DDT process is studied theoretically and the critical condition is given by a concise theoretical expression. The results show that a deflagration wave propagating with about 60% Chapman-Jouguet (CJ) detonation velocity is a critical condition. This velocity is the maximum propagating velocity of a deflagration wave and almost equal to the sound speed of combustion products. When this critical condition is reached, a CJ detonation is triggered immediately. This is the quantitative criteria of the DDT process.

关键词: deflagration, detonation, deflagration-to-detonation transition

Abstract: The study on deflagration-to-detonation transition (DDT) is very important because this mechanism has relevance to safety issues in industries, where combustible premixed gases are in general use. However, the quantitative prediction of DDT is one of the major unsolved problems in combustion and detonation theory to date. In this paper, the DDT process is studied theoretically and the critical condition is given by a concise theoretical expression. The results show that a deflagration wave propagating with about 60% Chapman-Jouguet (CJ) detonation velocity is a critical condition. This velocity is the maximum propagating velocity of a deflagration wave and almost equal to the sound speed of combustion products. When this critical condition is reached, a CJ detonation is triggered immediately. This is the quantitative criteria of the DDT process.

Key words: deflagration, detonation, deflagration-to-detonation transition

中图分类号: (Flames; combustion)

47.70.Pq

47.40.Rs (Detonation waves) 82.33.Vx (Reactions in flames, combustion, and explosions)

刘云峰, 沈欢, 张德良, 姜宗林. Theoretical analysis on deflagration-to-detonation transition[J]. 中国物理B, 2018, 27(8): 84703-084703.

Yun-Feng Liu(刘云峰), Huan Shen(沈欢), De-Liang Zhang(张德良), Zong-Lin Jiang(姜宗林). Theoretical analysis on deflagration-to-detonation transition[J]. Chin. Phys. B, 2018, 27(8): 84703-084703.

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Theoretical analysis on deflagration-to-detonation transition

Theoretical analysis on deflagration-to-detonation transition

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