| 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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| Source Publication | PROCEEDINGS OF THE COMBUSTION INSTITUTE
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| 2017 | |
| Volume | 36Issue:2Pages:2735-2742 |
| ISSN | 1540-7489 |
| Abstract | 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. |
| Keyword | Oblique Detonation Formation Structure Hydrogen Shock Wave Detailed Chemistry |
| DOI | 10.1016/j.proci.2016.09.025 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000397458900123 |
| WOS Keyword | CHEMICAL-KINETICS ; COMBUSTION ; SIMULATION ; STABILITY ; ALGORITHM ; SURFACES ; WAMR |
| WOS Research Area | Thermodynamics ; Energy & Fuels ; Engineering |
| WOS Subject | Thermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical |
| Funding Organization | NSFC(11372333 ; 51376165) |
| Department | LHD激波与爆轰物理 |
| Classification | 一类 |
| Ranking | 1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/60597 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Teng, HH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China. |
| Recommended Citation 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. |
| 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. |
| 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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| JouAr-2017-008.pdf（1409KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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