DNS analysis of the effects of combustion on turbulence in a supersonic H2/air jet flow

doi:10.1016/j.ast.2019.105362

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	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
刊名	AEROSPACE SCIENCE AND TECHNOLOGY
	2019-10-01
卷号	93 页码:9
关键词	Supersonic combustion Turbulence jet Direct numerical simulations Coherent structures
ISSN号	1270-9638
DOI	10.1016/j.ast.2019.105362
通讯作者	Li, Xinliang(lixl@imech.ac.cn)
英文摘要	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.
分类号	一类
资助项目	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]
WOS关键词	REYNOLDS-NUMBER ; FLAME ; HYDROGEN ; SIMULATION ; PRESSURE ; REGION ; FIELD ; AIR
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000494883800077
资助机构	NSFC ; National Key Research and Development Program of China ; Science Challenge Project ; Strategic Priority Research Program of Chinese Academy of Sciences
其他责任者	Li, Xinliang
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81409]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	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
推荐引用方式 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.