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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)
Source PublicationAdvances in Applied Mathematics and Mechanics
2014
Volume6Issue:6Pages:718-731
ISSN2070-0733
AbstractNumerical 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.
KeywordNumerical Simulation Detonation Ddt Energy Release Duct
Subject Area流体力学
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Indexed BySCI
Language英语
WOS IDWOS:000346401100002
Funding OrganizationThis 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.
DepartmentLHD激波与爆轰物理
ClassificationQ3
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49307
Collection高温气体动力学国家重点实验室
Corresponding AuthorDou HS
Recommended Citation
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.
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