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	Dimensions of CH4-jet flame in hot O2/CO2 coflow
	Mei, Zhenfeng ; Mi, Jianchun ; Wang, Feifei ; Zheng, Chuguang
	2012
DOI	10.1021/ef3000938
英文摘要	The present study has numerically simulated the oxy-fuel combustion of a methane (CH4) jet in hot coflow (JHC). The main objective is to investigate the influences of the oxygen (O2) molar fraction (XO 2*), temperature (Tcof*) and velocity ( vcof*) of the O2/CO2 coflow on dimensions of the JHC reaction zone or flame. The simulations use the model of eddy dissipation concept (EDC) with the detailed chemical mechanism described by GRI-Mech 3.0. To validate the modeling, several air-fuel JHC flames are predicted under the same conditions of the work of Dally et al. [Proc. Combust. Inst.2002, 29, 1147-1154]; the predictions match well with the measurements. Results suggest that, as either XO2* or vcof* decrease or Tcof* increases, the volume of the JHC reaction zone increases and hence the overall oxidation rate of CH4 decreases. In particular, raising the coflow speed vcof* causes the flame to be significantly thinner but only slightly longer. It is also demonstrated that the oxy-fuel reaction zone is larger, and so, the temperature is lower than the air-fuel counterpart. Besides, under identical conditions, the oxy-fuel combustion produces more carbon monoxide than does the air-fuel combustion. ? 2012 American Chemical Society.; EI; 6; 3257-3266; 26
语种	英语
内容类型	会议论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/461456]
专题	工学院
推荐引用方式 GB/T 7714	Mei, Zhenfeng,Mi, Jianchun,Wang, Feifei,et al. Dimensions of CH4-jet flame in hot O2/CO2 coflow[C]. 见:.

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