IMECH-IR  > 高温气体动力学国家重点实验室
Structure of wedge-induced oblique detonation in acetylene-oxygen-argon mixtures
Fang YS(方宜申); Zhang YH; Deng X; Teng HH(滕红辉)
Source PublicationPHYSICS OF FLUIDS
2019-02-01
Volume31Issue:2Pages:AR26108
ISSN1070-6631
AbstractStoichiometric acetylene-oxygen mixtures diluted by argon are widely used in normal detonation waves but have not yet been used in oblique detonation waves (ODWs). The present study simulates ODWs in acetylene-oxygen-argon mixtures, with a dilution ratio Phi = 50%-90%, using the reactive Euler equations with a detailed chemistry model, and describes the characteristics of acetylene ODWs. Similar to ODWs in hydrogen-air mixtures, the transition from the oblique shock wave to ODW may be either abrupt or smooth and the effects of Phi are investigated with a variable incident Mach number M-0. When M-0 changes between 8 and 10, the transition is abrupt in the case of Phi = 50%, while it is smooth in the case of Phi = 90%. In the case of Phi = 70%, a high M-0 corresponds to a smooth transition, while a low M-0 corresponds to an abrupt transition. A further study on the initiation mechanism was performed by comparing the numerical initiation length with the length obtained via the constant-volume combustion calculation, which demonstrated that the initiation is kinetic-controlled in the cases of Phi = 70% and 90%, but wave-controlled in the case of Phi = 50% with M-0 below 8.5. Moreover, an initiation structure featured by two-shock in the product was observed for the first time, and its formation mechanism is qualitatively discussed and compared to hydrogen ODWs. Published under license by AIP Publishing.
DOI10.1063/1.5086235
Indexed BySCI ; EI
Language英语
WOS IDWOS:000460093800094
WOS KeywordDIFFUSION-FLAME IGNITION ; SHOCK-WAVE IMPINGEMENT ; INITIATION ; STABILITY ; COMBUSTION ; PARAMETERS ; PROPULSION ; PATTERN
WOS Research AreaMechanics ; Physics, Fluids & Plasmas
WOS SubjectMechanics ; Physics
Funding OrganizationNSFC [11822202, 91641130]
Classification一类/力学重要期刊
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78512
Collection高温气体动力学国家重点实验室
Affiliation1.{Fang, Yishen} Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
2.{Fang, Yishen} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.{Zhang, Yuhang、Teng, Honghui} Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China
4.{Deng, Xi} Tokyo Inst Technol, Dept Mech Engn, Tokyo 1528550, Japan
Recommended Citation
GB/T 7714
Fang YS,Zhang YH,Deng X,et al. Structure of wedge-induced oblique detonation in acetylene-oxygen-argon mixtures[J]. PHYSICS OF FLUIDS,2019,31(2):AR26108.
APA 方宜申,Zhang YH,Deng X,&滕红辉.(2019).Structure of wedge-induced oblique detonation in acetylene-oxygen-argon mixtures.PHYSICS OF FLUIDS,31(2),AR26108.
MLA 方宜申,et al."Structure of wedge-induced oblique detonation in acetylene-oxygen-argon mixtures".PHYSICS OF FLUIDS 31.2(2019):AR26108.
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