| Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures | |
Fang YS(方宜申) ; Zhang ZJ(张子健); Hu ZM(胡宗民); Deng, X
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| Corresponding Author | Hu, Zongmin([email protected]) |
| Source Publication | AEROSPACE SCIENCE AND TECHNOLOGY
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| 2019-09-01 | |
| Volume | 92Pages:676-684 |
| ISSN | 1270-9638 |
| Abstract | Two-dimensional, oblique detonation waves (ODWs) in a stoichiometric hydrogen-air mixture are simulated with the reactive Euler equations using a detailed chemical reaction model. This study focuses on blunt wedge induced ODWs, which are not only influenced by inflow parameters but also the size of the blunt body. With the inflow parameters of flight altitude of 30 km and flight Mach number M-0 of 8-10, the numerical results demonstrate that the blunt wedge is crucial to initiate the ODW. In the case of M-0 = 10, the straight wedge without the blunt forebody can initiate the detonation. However, decreasing M-0 causes the failure of initiation, which can be compensated by increasing the radius R-0 of the blunt forebody. By adjusting R-0, two initiation procedures are observed and distinguished: one is the wedge-induced initiation and the other is the blunt forebody-induced initiation. Although both have been independently studied before, in this study, their coexistence is demonstrated, and the mechanism is analyzed for the first time. A theoretical analysis based on the classic initiation theory is performed to elucidate the initiation mechanism, giving a good agreement between the critical radius with numerical results. (C) 2019 Elsevier Masson SAS. All rights reserved. |
| Keyword | Oblique detonation wave Blunt wedge Initiation Hydrogen |
| DOI | 10.1016/j.ast.2019.06.031 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000485852600056 |
| WOS Keyword | TRANSITION ; SIMULATIONS |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Aerospace |
| Funding Project | Natural Science Foundation of China[11672308] ; Natural Science Foundation of China[11532014] |
| Funding Organization | Natural Science Foundation of China |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Hu, Zongmin |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/79985 |
| Collection | 高温气体动力学国家重点实验室 |
| Recommended Citation GB/T 7714 | Fang YS,Zhang ZJ,Hu ZM,et al. Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2019,92:676-684.Rp_Au:Hu, Zongmin |
| APA | 方宜申,张子健,胡宗民,&Deng, X.(2019).Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures.AEROSPACE SCIENCE AND TECHNOLOGY,92,676-684. |
| MLA | 方宜申,et al."Initiation of oblique detonation waves induced by a blunt wedge in stoichiometric hydrogen-air mixtures".AEROSPACE SCIENCE AND TECHNOLOGY 92(2019):676-684. |
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| Jp2019339.pdf（2321KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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