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	Modified vitiation in a moderate or intense low-oxygen dilution (MILD) combustion furnace
	Mi, J. ; Wang, F. ; Li, P. ; Dally, B.B.
	2012
DOI	10.1021/ef201161x
英文摘要	This paper reports on the effects of various operational and geometric parameters on mixing and vitiation in a laboratory-scale furnace operating with natural gas and under the moderate or intense low-oxygen dilution (MILD) regime. The study is carried out through numerical modeling. Seven independent parameters are considered: i.e., mass fraction (f) of fuel diluents (CO 2 and N2), air preheat temperature (Ta), global equivalence ratio (??), air nozzle exit diameter (Da), fuel nozzle exit diameter (Df), fuel-air nozzles separation distance (S), and fuel injection angle from the furnace floor (??). The modeling is initially verified through a comparison to measurements by Szego et al. (Szego, G. G., Dally, B. B., and Nathan, G. J.Combust. Flame 2008, 154, 281-295) in the same furnace geometry. It is shown that varying each of the parameters f, ??, Da, Df, S, and ?? can considerably influence the fuel-jet penetration distance and the recirculation rate of the exhaust gas, two important quantities for establishing the MILD combustion. Relatively, the geometric parameters Da, Df, S and ?? play more effective roles in controlling the vitiation rate and, hence, 'flame' characteristics. Also, it is revealed that influences of all of the parameters, except S and ??, can be represented by that of the ratio of the fuel injection momentum to the air injection momentum. ? 2011 American Chemical Society.; EI; 1; 265-277; 26
语种	英语
内容类型	会议论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/461470]
专题	工学院
推荐引用方式 GB/T 7714	Mi, J.,Wang, F.,Li, P.,et al. Modified vitiation in a moderate or intense low-oxygen dilution (MILD) combustion furnace[C]. 见:.

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