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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.
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2016
Volume41Issue:9Pages:5151-5161
ISSN0360-3199
AbstractThree-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.
KeywordScramjet Hydrogen Highly Underexpanded Jet Large Eddy Simulation
DOI10.1016/j.ijhydene.2016.01.120
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000372563100022
WOS KeywordScramjet ; Hydrogen ; Highly underexpanded jet ; Large eddy simulation
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels
WOS SubjectChemistry, Physical ; Electrochemistry ; Energy & Fuels
Funding OrganizationThe 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).
DepartmentLHD超声速燃烧
Classification二类
RankingTrue
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59538
Collection高温气体动力学国家重点实验室
Corresponding AuthorLi, XP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Recommended Citation
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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