Numerical simulation of deflagration to detonation transition in a straight duct: Effects of energy release and detonation stability

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	Numerical simulation of deflagration to detonation transition in a straight duct: Effects of energy release and detonation stability
	Dou HS; Hu ZM(胡宗民); Khoo BC; Jiang ZL(姜宗林)
刊名	Advances in Applied Mathematics and Mechanics
	2014
通讯作者邮箱	huashudou@yahoo.com
卷号	6 期号:6 页码:718-731
关键词	Numerical simulation detonation DDT energy release duct
ISSN号	2070-0733
通讯作者	Dou HS
产权排序	[Dou, Hua-Shu] Zhejiang Sci Tech Univ, Fac Mech Engn & Automat, Hangzhou 310018, Zhejiang, Peoples R China; [Hu, Zongmin; Jiang, Zonglin] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100080, Peoples R China; [Khoo, Boo Cheong] Natl Univ Singapore, Dept Mech Engn, Singapore 119260, Singapore
合作状况	国际
中文摘要	Numerical simulation based on the Euler equation and one-step reaction model is carried out to investigate the process of deflagration to detonation transition (DDT) occurring in a straight duct. The numerical method used includes a high resolution fifth-order weighted essentially non-oscillatory (WENO) scheme for spatial discretization, coupled with a third order total variation diminishing Runge-Kutta time stepping method. In particular, effect of energy release on the DDT process is studied. The model parameters used are the heat release at q = 50,30,25,20,15,10 and 5, the specific heat ratio at 1.2, and the activation temperature at Ti = 15, respectively. For all the cases, the initial energy in the spark is about the same compared to the detonation energy at the Chapman-Jouguet (CJ) state. It is found from the simulation that the DDT occurrence strongly depends on the magnitude of the energy release. The run-up distance of DDT occurrence decreases with the increase of the energy release for q = 50 similar to 20, and increases with the increase of the energy release for q = 20 similar to 5. This phenomenon is found to be in agreement with the analysis of mathematical stability theory. It is suggested that the factors to strengthen the DDT would make the detonation more stable, and vice versa. Finally, it is concluded from the simulations that the interaction of the shock wave and the flame front is the main reason for leading to DDT.
学科主题	流体力学
分类号	Q3
收录类别	SCI
资助信息	This work is supported by Science Foundation of Zhejiang Sci-Tech University (ZSTU) under Grant No. 11130032241201 and the opening research foundation of State Key Laboratory of High Temperature Gas Dynamics in Institute of Mechanics of Chinese Academy of Sciences.
原文出处	http://dx.doi.org/10.4208/aamm.2013.m159
语种	英语
WOS记录号	WOS:000346401100002
公开日期	2014-11-27
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49307]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Dou HS,Hu ZM,Khoo BC,et al. Numerical simulation of deflagration to detonation transition in a straight duct: Effects of energy release and detonation stability[J]. Advances in Applied Mathematics and Mechanics,2014,6(6):718-731.
APA	Dou HS,Hu ZM,Khoo BC,&Jiang ZL.(2014).Numerical simulation of deflagration to detonation transition in a straight duct: Effects of energy release and detonation stability.Advances in Applied Mathematics and Mechanics,6(6),718-731.
MLA	Dou HS,et al."Numerical simulation of deflagration to detonation transition in a straight duct: Effects of energy release and detonation stability".Advances in Applied Mathematics and Mechanics 6.6(2014):718-731.