| Initiation characteristics of wedge-induced oblique detonation waves in a stoichiometric hydrogen-air mixture |
| Teng HH(滕宏辉) ; Ng HD; Jiang ZL(姜宗林); Teng, HH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
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| 发表期刊 | PROCEEDINGS OF THE COMBUSTION INSTITUTE
 |
| 2017
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| 卷号 | 36期号:2页码:2735-2742 |
| ISSN | 1540-7489
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| 摘要 | The initiation features of two-dimensional oblique detonations from a wedge in a stoichiometric hydrogen-air mixture are investigated via numerical simulations using the reactive Euler equations with de-tailed chemistry. A parametric study is performed to analyze the effect of inflow pressure P-0 and Mach number M-0 on the initiation structure and length. The present numerical results demonstrate that the two transition patterns i.e. an abrupt transition from a multi-wave point connecting the oblique shock and the detonation surface and a smooth transition via a curved shock depend strongly on the inflow Mach number while the inflow pressure is found to have little effect on the oblique shock-to-detonation transition type. The present results also reveal a slightly more complex structure of abrupt transition type in the case of M-0 = 7.0 consisting of various chemical and gasdynamic processes in the shocked gas mixtures. The present results show quantitatively that the initiation length decreases with increasing M-0 primarily due to the in-crease of post-shock temperature. Furthermore the effect of M-0 on initiation length is independent of P-0 but given the same M-0 the initiation length is found to be inversely proportional to P-0. Theoretical analysis based on the constant volume combustion (CVC) theory is also performed and the results are close to the numerical simulations in the case of high M-0 regardless of P-0 demonstrating that the post-oblique-shock condition i.e. post-shock temperature is the key parameter affecting the initiation. At decreasing M-0 the CVC theory breaks down suggesting a switch from chemical kinetics-controlled to a wave-controlled gasdynamic process. For high inflow pressure P-0 at decreasing M-0 the CVC theoretical estimations depart from numerical results faster than those of low P-0 due to the presence of the non-monotonic effects of chemical kinetic limits in hydrogen oxidation at high pressure. (C) 2016 by The Combustion Institute. Published by Elsevier Inc. |
| 关键词 | Oblique Detonation
Formation Structure
Hydrogen
Shock Wave
Detailed Chemistry
|
| DOI | 10.1016/j.proci.2016.09.025
|
| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000397458900123
|
| 关键词[WOS] | CHEMICAL-KINETICS
; COMBUSTION
; SIMULATION
; STABILITY
; ALGORITHM
; SURFACES
; WAMR
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| WOS研究方向 | Thermodynamics
; Energy & Fuels
; Engineering
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| WOS类目 | Thermodynamics
; Energy & Fuels
; Engineering, Chemical
; Engineering, Mechanical
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| 项目资助者 | NSFC(11372333
; 51376165)
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| 课题组名称 | LHD激波与爆轰物理
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| 论文分区 | 一类
|
| 力学所作者排名 | 1
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/60597
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| 专题 | 高温气体动力学国家重点实验室
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| 通讯作者 | Teng, HH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
推荐引用方式
GB/T 7714 |
Teng HH,Ng HD,Jiang ZL,et al. Initiation characteristics of wedge-induced oblique detonation waves in a stoichiometric hydrogen-air mixture[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2017,36,2,:2735-2742.
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| APA |
滕宏辉,Ng HD,姜宗林,&Teng, HH .(2017).Initiation characteristics of wedge-induced oblique detonation waves in a stoichiometric hydrogen-air mixture.PROCEEDINGS OF THE COMBUSTION INSTITUTE,36(2),2735-2742.
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| MLA |
滕宏辉,et al."Initiation characteristics of wedge-induced oblique detonation waves in a stoichiometric hydrogen-air mixture".PROCEEDINGS OF THE COMBUSTION INSTITUTE 36.2(2017):2735-2742.
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