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Numerical simulation of ignition and combustion of ethylene in a supersonic model combustor with a reduced kinetic mechanism
Zhong FQ(仲峰泉); Chen LH(陈立红); Li F(李飞); Zhang XY(张新宇); Sung CJ; Zhong, FQ (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
Source PublicationCOMBUSTION SCIENCE AND TECHNOLOGY
2013-04-03
Volume185Issue:4Pages:548-563
ISSN0010-2202
AbstractThe unsteady process of ignition and combustion of ethylene at varied fuel/air equivalence ratios in a Mach 2.5 supersonic model combustor is studied numerically. The reacting turbulent flow is solved using the shear stress transport (SST) k-ω turbulence model and a reduced kinetic mechanism obtained with sensitivity analysis and the assumption of quasi-steady-state from a detailed mechanism of ethylene. The present results reveal that ignition of ethylene first takes place in the cavity due to the local low speed and high static temperature. At a low equivalence ratio of 0.32, combustion is established and stabilized downstream of the cavity. However, as the equivalence ratio increases to 0.6, the combustion downstream of the cavity generates sufficient heat release to cause pressure and the flame to propagate upstream and to generate a shock train upstream of the injection point. Formation of the shock structure results in subsonic flow in the vicinity of the injection and combustion with higher efficiency stabilized mainly in the fuel/air mixing shear layer. The time evolutions of fuel jet and C2H2 qualitatively agree well with the experimental results, of which high-speed schlieren photos and chemiluminescence images of CH* are obtained at similar flow conditions.
KeywordEthylene Ignition Numerical Simulation Reduced Kinetic Mechanism Supersonic Combustion
Subject Area流体力学 ; 计算流体力学
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000316780400002
Funding OrganizationNatural Science Foundation of China [10921062, 11172309]; China's Programme of Introducing Talents of Discipline to Universities-111 Project [B08009]; Thousand Talents Program
DepartmentLHD高温气流激光诊断
Classification二类
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47192
Collection高温气体动力学国家重点实验室
Corresponding AuthorZhong, FQ (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zhong FQ,Chen LH,Li F,et al. Numerical simulation of ignition and combustion of ethylene in a supersonic model combustor with a reduced kinetic mechanism[J]. COMBUSTION SCIENCE AND TECHNOLOGY,2013,185(4):548-563.
APA 仲峰泉,陈立红,李飞,张新宇,Sung CJ,&Zhong, FQ .(2013).Numerical simulation of ignition and combustion of ethylene in a supersonic model combustor with a reduced kinetic mechanism.COMBUSTION SCIENCE AND TECHNOLOGY,185(4),548-563.
MLA 仲峰泉,et al."Numerical simulation of ignition and combustion of ethylene in a supersonic model combustor with a reduced kinetic mechanism".COMBUSTION SCIENCE AND TECHNOLOGY 185.4(2013):548-563.
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