A numerical study on the instability of oblique detonation waves with a two-step induction-reaction kinetic model | |
Yang PF; Teng HH(滕宏辉); Ng HD; Jiang ZL(姜宗林) | |
发表期刊 | PROCEEDINGS OF THE COMBUSTION INSTITUTE |
2019-02-01 | |
卷号 | 37期号:3页码:3537-3544 |
ISSN | 1540-7489 |
摘要 | In this study, the surface instability of oblique detonation waves (ODW) formed by two-dimensional, semi-infinite wedges is investigated numerically by solving the unsteady Euler equations with a two-step induction-reaction kinetic model. The chemical kinetic model introduces two length scales, namely, induction and reaction lengths, which can be varied independently to change the sensitivity of the chemical reaction and also the shape of the reaction zone structure. The present numerical results elucidate that both smooth and cellular ODW surfaces may appear after the initiation, and the surface becomes unstable when the reaction zone length decreases while keeping the induction zone the same as observed in normal detonation wave propagation. To investigate the degree of instability quantitatively, the oscillations of post-shock pressure inside the reaction zone are examined, and analyzed using Fast Fourier Transformation (FFT) to get the power spectral density (PSD Equivalent to normal detonations, the stability parameter chi as defined by the ratio of induction length over the reaction length multiplied by the global reduced activation energy can also be used to describe qualitatively the trends of the ODW surface instability observed in this study. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved. |
关键词 | Oblique detonation Induction-reaction kinetics Unstable surface Power spectral density |
DOI | 10.1016/j.proci.2018.05.090 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000456628600102 |
关键词[WOS] | INITIATION ; WEDGE ; DYNAMICS |
WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical |
WOS类目 | Thermodynamics ; Energy & Fuels ; Engineering |
项目资助者 | National Natural Science Foundation of China NSFC [91641130, 11372333] ; Natural Sciences and Engineering Research Council of Canada (NSERC) |
论文分区 | 一类 |
力学所作者排名 | 5 |
RpAuthor | Teng, HH |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/78204 |
专题 | 高温气体动力学国家重点实验室 |
作者单位 | 1.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China 2.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Concordia Univ, Dept Mech Ind & Aerosp Engn, Montreal, PQ H3G 1M8, Canada |
推荐引用方式 GB/T 7714 | Yang PF,Teng HH,Ng HD,et al. A numerical study on the instability of oblique detonation waves with a two-step induction-reaction kinetic model[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2019,37,3,:3537-3544. |
APA | Yang PF,Teng HH,Ng HD,&Jiang ZL.(2019).A numerical study on the instability of oblique detonation waves with a two-step induction-reaction kinetic model.PROCEEDINGS OF THE COMBUSTION INSTITUTE,37(3),3537-3544. |
MLA | Yang PF,et al."A numerical study on the instability of oblique detonation waves with a two-step induction-reaction kinetic model".PROCEEDINGS OF THE COMBUSTION INSTITUTE 37.3(2019):3537-3544. |
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