| DNS analysis of the effects of combustion on turbulence in a supersonic H2/air jet flow | |
Fu YW(符耀威)1,2; Yu ZP(于长平)1,2 ; Yan Z(闫正)1,2; Li XL(李新亮)1,2
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| Corresponding Author | Li, Xinliang([email protected]) |
| Source Publication | AEROSPACE SCIENCE AND TECHNOLOGY
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| 2019-10-01 | |
| Volume | 93Pages:9 |
| ISSN | 1270-9638 |
| Abstract | In this paper, the effects of combustion on turbulence features are investigated by direct numerical simulation (DNS) of supersonic round turbulent hydrogen jet flows. Two DNS cases are conducted: the one is combustion hydrogen/air jet and the other is non-combustion jet with the same components as a comparison case. In the DNS, the supersonic jet consists of 85% hydrogen and 15% nitrogen in volume with temperature of 305 K and jet velocity of 900 m/s. The ambient air velocity is 20 m/s and temperature is 1150 K. The Reynolds numbers based the jet exit diameter and hydrogen jet velocity both are 22000 and the jet Mach numbers both are 1.2. The DNS results show that occurrence of combustion significantly delays the transition of the jet flow, and results in a 38% decrease in the peak of turbulent kinetic energy, compared with the non-combustion jet flow. The decreasing of the Reynolds number due to the heat release is considered as the main reason. Compared with the non-combustion jet flow, the combustion jet flow has more complete coherent vortex rings in the early stage. In addition, the positive and minus energy fluxes of combustion jet flow are always larger than that of non-combustion jet flow. (C) 2019 Elsevier Masson SAS. All rights reserved. |
| Keyword | Supersonic combustion Turbulence jet Direct numerical simulations Coherent structures |
| DOI | 10.1016/j.ast.2019.105362 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000494883800077 |
| WOS Keyword | REYNOLDS-NUMBER ; FLAME ; HYDROGEN ; SIMULATION ; PRESSURE ; REGION ; FIELD ; AIR |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Aerospace |
| Funding Project | NSFC[91852203] ; NSFC[11472278] ; National Key Research and Development Program of China[2016YFA0401200] ; Science Challenge Project[TZ2016001] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA17030100] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDC01000000] |
| Funding Organization | NSFC ; National Key Research and Development Program of China ; Science Challenge Project ; Strategic Priority Research Program of Chinese Academy of Sciences |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Li, Xinliang |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/81410 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Fu YW,Yu ZP,Yan Z,et al. DNS analysis of the effects of combustion on turbulence in a supersonic H2/air jet flow[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2019,93:9.Rp_Au:Li, Xinliang |
| APA | 符耀威,于长平,闫正,&李新亮.(2019).DNS analysis of the effects of combustion on turbulence in a supersonic H2/air jet flow.AEROSPACE SCIENCE AND TECHNOLOGY,93,9. |
| MLA | 符耀威,et al."DNS analysis of the effects of combustion on turbulence in a supersonic H2/air jet flow".AEROSPACE SCIENCE AND TECHNOLOGY 93(2019):9. |
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| Jp2019518.pdf（2894KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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