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Title:
Numerical simulation of ignition and combustion of ethylene in a supersonic model combustor with a reduced kinetic mechanism
Author: Zhong FQ(仲峰泉); Chen LH(陈立红); Li F(李飞); Zhang XY(张新宇); Sung CJ
Source: COMBUSTION SCIENCE AND TECHNOLOGY
Issued Date: 2013-04-03
Volume: 185, Issue:4, Pages:548-563
Abstract: The 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.
Keyword: Ethylene ; Ignition ; Numerical simulation ; Reduced kinetic mechanism ; Supersonic combustion
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Zhong, FQ (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China.
Correspondent Email: fzhong@imech.ac.cn
Related URLs: 查看原文
WOS ID: WOS:000316780400002
ISSN: 0010-2202
Rank: [Zhong, Fengquan; Chen, Lihong; Li, Fei; Zhang, Xinyu] Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; [Sung, Chih-Jen] Univ Connecticut, Storrs, CT USA
Subject: 流体力学; 流体力学::计算流体力学
Department: LHD高温气流激光诊断
Classification: 二类
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/47192
Appears in Collections:高温气体动力学国家重点实验室_期刊论文

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Recommended Citation:
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,2013-04-03,185(4):548-563.
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