IMECH-IR  > 高温气体动力学国家重点实验室
A numerical study on the instability of oblique detonation waves with a two-step induction-reaction kinetic model
Yang PFi; Teng HH; Ng HD; Jiang ZL(姜宗林)
Source PublicationPROCEEDINGS OF THE COMBUSTION INSTITUTE
2019-02-01
Volume37Issue:3Pages:3537-3544
ISSN1540-7489
AbstractIn 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.
KeywordOblique detonation Induction-reaction kinetics Unstable surface Power spectral density
DOI10.1016/j.proci.2018.05.090
Indexed BySCI ; EI
Language英语
WOS IDWOS:000456628600102
WOS KeywordINITIATION ; WEDGE ; DYNAMICS
WOS Research AreaThermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical
WOS SubjectThermodynamics ; Energy & Fuels ; Engineering
Funding OrganizationNational Natural Science Foundation of China NSFC [91641130, 11372333] ; Natural Sciences and Engineering Research Council of Canada (NSERC)
Classification一类
Ranking5
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78204
Collection高温气体动力学国家重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
Yang PFi,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 PFi,Teng HH,Ng HD,&姜宗林.(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 PFi,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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