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Stretch extinction characteristics of CH4/CO2 versus O-2/H2O/CO2 and O-2/H2O counterflow non-premixed flames at different oxidizer temperatures
Li, Xing1; Yang, Haolin; Jiang, Liqiao; Wang, Xiaohan; Zhao, Daiqing
2016-12-15
发表期刊FUEL
卷号186页码:648-655
摘要The concentrations of CO2 and H2O in the combustion environment are important for the combustion characteristics of oxygen-enriched flames using hot oxidizers with large amount of CO2 and/or H2O. To understand the variations of flame temperature and stretch extinction limit of oxygen -enriched flames with H2O and CO2 concentrations, the CH4/CO2 versus O-2/H2O/CO2 and O-2/H2O counterflow non-premixed flames with the oxygen mole fraction of 0.35 were investigated numerically and compared with those of the CH4/CO2 versus O-2/CO2 (XO2 = 0.35) flames at the oxidizer temperatures of 500, 700 and 1000 K. Two O-2/H2O/CO2 mixtures with different H2O and CO2 concentrations were used as the oxidizers in the study. The results show that the flame temperature and the extinction strain rate are increased when the CO2 in the oxidizer has been replaced by H2O. The analysis based on the theoretical solution and computational result suggests that the total amount of OH radicals of the flame can be used as a criterion for the comparison of stretch extinction limit. The computational results show that the production rate of OH radicals via the reaction O + H2O = 2OH is comparable to that of H + O-2 = O + OH when H2O is added in the oxidizer. And the amount of OH radicals generated by O + H2O = 2OH increases with increasing H2O molar fraction of the oxidizer, resulting in a significant increase of the extinction strain rate. (C) 2016 Elsevier Ltd. All rights reserved.
文章类型Article
关键词Counterflow Non-premixed Flame High Temperature Oxidizer Co2 And H2o Concentrations Stretch Extinction Limit Flame Temperature
WOS标题词Science & Technology ; Technology
资助者National Natural Science Foundation of China(51506204) ; Guangdong Natural Science Foundation(2016A030310125) ; National Basic Research Program of China(2014CB239601) ; National Natural Science Foundation of China(51506204) ; Guangdong Natural Science Foundation(2016A030310125) ; National Basic Research Program of China(2014CB239601)
DOI10.1016/j.fuel.2016.09.017
研究领域[WOS]Energy & Fuels ; Engineering
关键词[WOS]OXY-STEAM COMBUSTION ; ELEVATED PRESSURES ; DIFFUSION FLAMES ; FLAMMABILITY LIMIT ; POWER-GENERATION ; FUEL COMBUSTION ; METHANE FLAMES ; CO2 ; IGNITION ; AIR
收录类别SCI
语种英语
资助者National Natural Science Foundation of China(51506204) ; Guangdong Natural Science Foundation(2016A030310125) ; National Basic Research Program of China(2014CB239601) ; National Natural Science Foundation of China(51506204) ; Guangdong Natural Science Foundation(2016A030310125) ; National Basic Research Program of China(2014CB239601)
WOS类目Energy & Fuels ; Engineering, Chemical
WOS记录号WOS:000385318600066
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/13740
专题中国科学院广州能源研究所
作者单位1.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式
GB/T 7714
Li, Xing,Yang, Haolin,Jiang, Liqiao,et al. Stretch extinction characteristics of CH4/CO2 versus O-2/H2O/CO2 and O-2/H2O counterflow non-premixed flames at different oxidizer temperatures[J]. FUEL,2016,186:648-655.
APA Li, Xing,Yang, Haolin,Jiang, Liqiao,Wang, Xiaohan,&Zhao, Daiqing.(2016).Stretch extinction characteristics of CH4/CO2 versus O-2/H2O/CO2 and O-2/H2O counterflow non-premixed flames at different oxidizer temperatures.FUEL,186,648-655.
MLA Li, Xing,et al."Stretch extinction characteristics of CH4/CO2 versus O-2/H2O/CO2 and O-2/H2O counterflow non-premixed flames at different oxidizer temperatures".FUEL 186(2016):648-655.
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