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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
Corresponding AuthorLi, Xinliang(lixl@imech.ac.cn)
Source PublicationAEROSPACE SCIENCE AND TECHNOLOGY
2019-10-01
Volume93Pages:9
ISSN1270-9638
AbstractIn 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.
KeywordSupersonic combustion Turbulence jet Direct numerical simulations Coherent structures
DOI10.1016/j.ast.2019.105362
Indexed BySCI ; EI
Language英语
WOS IDWOS:000494883800077
WOS KeywordREYNOLDS-NUMBER ; FLAME ; HYDROGEN ; SIMULATION ; PRESSURE ; REGION ; FIELD ; AIR
WOS Research AreaEngineering
WOS SubjectEngineering, Aerospace
Funding ProjectNSFC[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 OrganizationNSFC ; National Key Research and Development Program of China ; Science Challenge Project ; Strategic Priority Research Program of Chinese Academy of Sciences
Classification一类
Ranking1
ContributorLi, Xinliang
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81410
Collection高温气体动力学国家重点实验室
Affiliation1.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.
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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