| Numerical investigation of flow structures resulting from the interaction between an oblique detonation wave and an upper expansion corner | |
Wang KL(王宽亮)1 ; Teng HH(滕宏辉)1; Yang PF(杨鹏飞)2,3; Ng HD4
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| Corresponding Author | Teng, Honghui([email protected]) |
| Source Publication | JOURNAL OF FLUID MECHANICS
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| 2020-11-25 | |
| Volume | 903Pages:17 |
| ISSN | 0022-1120 |
| Abstract | Wedge-induced oblique detonation waves (ODWs) have been studied widely, but their interactions with complicated geometries have not been fully addressed. In this study, we investigate ODW interaction with a deflected upper corner due to confinement change upstream of the ODW. Numerical simulations are conducted using the reactive Euler equations with a two-step induction-reaction kinetic model. Two ODWs without the upper wall deflection are first simulated to resolve the basic structures with inflow Mach numbers M-0 = 6 and 7. Thereafter, we introduce a deflected upper confinement, resulting in a new wave configuration. This wave is characterized by a post-turning, triangular recirculation zone coupled with a gaseous wedge connecting the deflection point and ODW surface. A parametric study is performed to analyse the effects of the deflection location, deflection angle and activation energy of the heat release reaction. The results reveal that the wave configuration is due to the evolution of ODW decoupling in an expanded supersonic flow. We further study the surface stability and structural unsteadiness arising for M-0 = 6. Upstream-travelling transverse waves are observed for the first time, and effects of different parameters on the surface instability are analysed via fast Fourier transforms. Two destabilizing mechanisms of ODW structures are proposed, one from the post-surface thermal choking and the other from the enhanced surface instability. |
| Keyword | detonation waves |
| DOI | 10.1017/jfm.2020.644 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000573247000001 |
| WOS Keyword | WEDGE ; INSTABILITY |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China (NSFC)[11822202] ; National Natural Science Foundation of China (NSFC)[91641130] ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; 111 Project[B16003] |
| Funding Organization | National Natural Science Foundation of China (NSFC) ; Natural Sciences and Engineering Research Council of Canada (NSERC) ; 111 Project |
| Classification | 一类/力学重要期刊 |
| Ranking | 3 |
| Contributor | Teng, Honghui |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85307 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Beijing Inst Technol, Sch Aerosp Engn, Beijing 100081, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, 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 | Wang KL,Teng HH,Yang PF,et al. Numerical investigation of flow structures resulting from the interaction between an oblique detonation wave and an upper expansion corner[J]. JOURNAL OF FLUID MECHANICS,2020,903:17.Rp_Au:Teng, Honghui |
| APA | 王宽亮,滕宏辉,杨鹏飞,&Ng HD.(2020).Numerical investigation of flow structures resulting from the interaction between an oblique detonation wave and an upper expansion corner.JOURNAL OF FLUID MECHANICS,903,17. |
| MLA | 王宽亮,et al."Numerical investigation of flow structures resulting from the interaction between an oblique detonation wave and an upper expansion corner".JOURNAL OF FLUID MECHANICS 903(2020):17. |
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| Jp2020326.pdf（1764KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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