A comparative study of highly underexpanded nitrogen and hydrogen jets using large eddy simulation

doi:10.1016/j.ijhydene.2016.01.120

	A comparative study of highly underexpanded nitrogen and hydrogen jets using large eddy simulation
	Li XP(李晓鹏); Wu K(吴坤); Yao W(姚卫); Fan XJ(范学军); Li, XP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
发表期刊	INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
	2016
卷号	41 期号:9 页码:5151-5161
ISSN	0360-3199
摘要	Three-dimensional large eddy simulations (LES) of highly underexpanded hydrogen and nitrogen jets at the same nozzle pressure ratio (NPR) of 5.60 and at a Reynolds number around 105 are performed. The classical near-field structures of highly underexpanded jets are well captured by LES, especially the shape and size of Mach barrel for both jets are very similar and agree well with the available literature data. However, the flow field and the shock structures after the Mach disk differ significantly. The density in the annular shear layer of H-2 jet is much lower because of its smaller molecular weight. Meanwhile, the H-2 jet has a much longer jet core and more shock cells. The dominant instability mode is helical for the N-2 jet, but is axisymmetric for the H-2 jet. There are two discrete peaks of f(s) = 37.086 kHz and f(2s) = 45.695 kHz in the spectrum of the N-2 jet, while the spectrum of the H-2 jet is characterized by a fundamental screech frequency of f(s) = 47.020 kHz and its high-order harmonics. The H-2 jet mixes more rapidly with the ambient air but has a much smaller mixing area on cross-section planes. Mixing between the ambient air and fuel still takes places at the jet boundary defined according to the mixture fraction of Z = 0.02, and the area of fully turbulent region of the highly underexpanded jets seems to be less predicted based on the traditional vorticity T/NT (turbulent/non-turbulent) interface for both jets. Copyright (C) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词	Scramjet Hydrogen Highly Underexpanded Jet Large Eddy Simulation
DOI	10.1016/j.ijhydene.2016.01.120
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000372563100022
关键词[WOS]	Scramjet ; Hydrogen ; Highly underexpanded jet ; Large eddy simulation
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels
WOS类目	Chemistry, Physical ; Electrochemistry ; Energy & Fuels
项目资助者	The Project was supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 10621202) and National Natural Science Foundation of China (Grant No. 11502270).
课题组名称	LHD超声速燃烧
论文分区	二类
力学所作者排名	True
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59538
专题	高温气体动力学国家重点实验室
通讯作者	Li, XP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Li XP,Wu K,Yao W,et al. A comparative study of highly underexpanded nitrogen and hydrogen jets using large eddy simulation[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2016,41,9,:5151-5161.
APA	Li XP,Wu K,Yao W,Fan XJ,&Li, XP .(2016).A comparative study of highly underexpanded nitrogen and hydrogen jets using large eddy simulation.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,41(9),5151-5161.
MLA	Li XP,et al."A comparative study of highly underexpanded nitrogen and hydrogen jets using large eddy simulation".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 41.9(2016):5151-5161.

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