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Z.Zhou, Z.Q. Tao,B.Y.Lin,et al. Numerical investigation on effects of high initial temperatures and pressures on flame behavior of ... International Journal of Hydrogen Energy 38(2013)274-281

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Numerical investigation on effects of high initial temperatures and pressures on flame behavior of CO/H-2/Air mixtures near the dilution limit
作者:Zhou, Z (Zhou, Z.)[ 1,2 ] ; Tao, ZQ (Tao, Z. Q.)[ 1,2 ] ; Lin, BY (Lin, B. Y.)[ 1 ] ; Kong, WJ (Kong, W. J.)[ 1 ]
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷: 38 期: 1 页: 274-281
DOI: 10.1016/j.ijhydene.2012.10.017
出版年: JAN 11 2013
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摘要
This study investigates effects of initial temperatures and pressures on dilution limits of CO/H-2/air mixtures by numerical simulation of one-dimensional laminar premixed flames of CO/H-2/air mixtures (50%CO-50%H-2). Maximum flame temperatures, laminar flame speeds, mass burning rates and flame thickness near the dilution limits are analyzed. Results reveal that the dilution limits are extended at the elevated initial temperatures. The laminar flame speeds and mass burning rates at the dilution limits increase with the elevation of initial temperature, however, the flame thickness at the dilution limits decreases with increasing pressures and increases slightly with elevated initial temperature. The decreased flame thickness renders the flamelet modeling more favorable for turbulent combustion at elevated pressure conditions. The ratio of the flame thickness to the reaction thickness and the Zeldovich number increase first and then decrease with increasing pressure, but the non-monotonic trend of ratio of flame thickness to reaction thickness with the increasing pressures is unnoticeable. Sensitivity analysis suggested that the non-monotonic trend of the Zeldovich number could be caused by the combined effects of following elementary reactions: H + O-2 + M -> HO2 + M, 2HO(2) -> H2O2 + O-2 and H2O2 + M -> 2OH + M. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词
作者关键词:Syngas; High temperature; High pressure; Dilution limit
KeyWords Plus:COMBUSTION; PROPAGATION; EXTINCTION; HYDROGEN; FUEL
作者信息
通讯作者地址: Kong, WJ (通讯作者)
Chinese Acad Sci, Key Lab Light Duty Gas Turbine, Inst Engn Thermophys, 11 West Rd,4th Ring N, Beijing 100190, Peoples R China.
地址:
[ 1 ] Chinese Acad Sci, Key Lab Light Duty Gas Turbine, Inst Engn Thermophys, Beijing 100190, Peoples R China
[ 2 ] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
电子邮件地址:wjkong@iet.cn
基金资助致谢
基金资助机构授权号
National Natural Science Foundation of China (NSFC)
50976115
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出版商
PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
类别 / 分类
研究方向:Chemistry; Electrochemistry; Energy & Fuels
Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels
文献信息
文献类型:Article
语种:English
入藏号: WOS:000315001500031
ISSN: 0360-3199
期刊信息
目录： Current Contents Connect®
Impact Factor (影响因子): Journal Citation Reports®
其他信息
IDS 号: 090SY
Web of Science 核心合集中的 "引用的参考文献": 33
Web of Science 核心合集中的 "被引频次": 0