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Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor
Zhong FQ(仲峰泉)1,2; Cheng LW(程柳维)1; Gu HB(顾红斌)1; Zhang XY(张新宇)1,2
Corresponding AuthorZhong, Fengquan(fzhong@imech.ac.cn)
Source PublicationAEROSPACE SCIENCE AND TECHNOLOGY
2019-03-01
Volume86Pages:775-781
ISSN1270-9638
AbstractIn this paper, flame characteristics of ethylene and its mixture with methane and hydrogen in process of ignition in a Mach 2.5 supersonic model combustor are studied. Development of flame structure is visualized with CH* chemiluminescence images recorded by high-speed camera. The dominant frequencies associated with flame oscillations are identified via fast-response pressure measurements. The present results show that there are two typical flame structures of triangle-shape and ellipse-shape found at relatively low and high fuel-to-air equivalence ratios respectively. The triangular flame at low equivalence ratios is mainly located in the shear layer of cavity flow and has small oscillations featured with low frequencies. At high fuel-to-air equivalence ratios, flame moves upstream and is anchored at the front edge of the cavity with elliptic shape and larger oscillations. The wall pressure distributions indicate that shock structures are formed in the isolator upstream of fuel injections at high equivalence ratios, leading to low speed flow in vicinity of fuel injections and causing flame move forward and change shape. Dominant frequencies from 49 Hz to 317 Hz are found for ethylene or mixture fuels. As fuel-to-air equivalence ratio increases, the dominant frequencies become smaller. For mixture fuel with hydrogen and methane, similar ignition process and flame structures are observed. However, the dominant frequencies related to flame oscillations for mixture fuels are not the same due to different combustion performance and thermal dissipation on turbulent flow. (C) 2019 Published by Elsevier Masson SAS.
KeywordSupersonic combustor Hydrocarbon Mixture fuel Flame structure Ignition
DOI10.1016/j.ast.2019.01.039
Indexed BySCI ; EI
Language英语
WOS IDWOS:000463305200064
WOS KeywordHEAT SINK CAPACITY ; SCRAMJET COMBUSTOR ; AVIATION KEROSENE ; CRACKING
WOS Research AreaEngineering
WOS SubjectEngineering, Aerospace
Funding ProjectNational Natural Science Foundation of China[91441102] ; National Natural Science Foundation of China[11672307] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences
Classification一类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78712
Collection高温气体动力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhong FQ,Cheng LW,Gu HB,et al. Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2019,86:775-781.
APA 仲峰泉,程柳维,顾红斌,&张新宇.(2019).Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor.AEROSPACE SCIENCE AND TECHNOLOGY,86,775-781.
MLA 仲峰泉,et al."Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor".AEROSPACE SCIENCE AND TECHNOLOGY 86(2019):775-781.
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