Initiation characteristics of wedge-induced oblique detonation waves in a stoichiometric hydrogen-air mixture
文献类型：期刊论文
| 作者 | Teng HH(滕宏辉) ; Ng HD; Jiang ZL(姜宗林)
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| 刊名 | PROCEEDINGS OF THE COMBUSTION INSTITUTE
 |
| 出版日期 | 2017 |
| 卷号 | 36期号:2页码:2735-2742 |
| 关键词 | Oblique detonation Formation structure Hydrogen Shock wave Detailed chemistry |
| ISSN号 | 1540-7489 |
| 中文摘要 | 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. |
| 类目[WOS] | Thermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical |
| 研究领域[WOS] | Thermodynamics ; Energy & Fuels ; Engineering |
| 关键词[WOS] | CHEMICAL-KINETICS ; COMBUSTION ; SIMULATION ; STABILITY ; ALGORITHM ; SURFACES ; WAMR |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000397458900123 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/60597]  |
| 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 | Teng HH,Ng HD,Jiang ZL. 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. |
| APA | 滕宏辉,Ng HD,&姜宗林.(2017).Initiation characteristics of wedge-induced oblique detonation waves in a stoichiometric hydrogen-air mixture.PROCEEDINGS OF THE COMBUSTION INSTITUTE,36(2),2735-2742. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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