Chemical Flame Length of a Methane Jet into Oxidant Stream

doi:10.1007/s10494-015-9598-0

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	Chemical Flame Length of a Methane Jet into Oxidant Stream
	Mei, Z. ; Mi, J. ; Wang, F. ; Li, P. ; Zhang, J.
刊名	FLOW TURBULENCE AND COMBUSTION
	2015
关键词	Chemical flame length Visible flame length Complete combustion Flame lift-off DILUTED HOT COFLOW MILD COMBUSTION NITROGEN EMISSIONS DIFFUSION FLAME LIFT-OFF TURBULENT FLOW TEMPERATURE SIMULATION MECHANISM
DOI	10.1007/s10494-015-9598-0
英文摘要	The present paper reports a systematic study on different methods of obtaining the chemical length of a turbulent non-premixed CH (4) jet flame. The study is performed based on numerical simulations by the RANS modeling over wide ranges of the fuel jet velocity (25 similar to 100 m/s), the coflow oxygen concentration (6 similar to 100 % by volume) and the coflow temperature (300 similar to 2000 K). To validate the modeling, some calculations are compared with previous measurements of Dally et al. (Proc. Combust. Inst. 29, 1147-1154, 2002) and Kim et al. (Energy Fuels 21, 1459-1467, 2007). Primary results reveal that, among seven different definitions of chemical flame length, the best performance is made by those defined from the yield ratio of CO to CO (2) at y (C O) / y (C O2)= 0.02 and the carbon monoxide ratio at R (C O) = X (C O) /X (C O m a x) = 0.01. It is also found that only use of these two definitions exhibit the flame lift-off behavior and to gain the lift-off height properly. Besides, this paper explains the importance of taking the near-zero contour of the CO concentration as the base on which the border of the complete combustion region is defined for chemical flame length.; National Natural Science Foundation of China [51276002, 51406001]; Special Research Fund for the Doctoral Program of Higher Education of China [20110001130014]; China Postdoctoral Science Foundation [2014M550011]; SCI(E); EI; ARTICLE; jcmi@coe.pku.edu.cn; 4; 767-794; 94
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/419781]
专题	工学院
推荐引用方式 GB/T 7714	Mei, Z.,Mi, J.,Wang, F.,et al. Chemical Flame Length of a Methane Jet into Oxidant Stream[J]. FLOW TURBULENCE AND COMBUSTION,2015.
APA	Mei, Z.,Mi, J.,Wang, F.,Li, P.,&Zhang, J..(2015).Chemical Flame Length of a Methane Jet into Oxidant Stream.FLOW TURBULENCE AND COMBUSTION.
MLA	Mei, Z.,et al."Chemical Flame Length of a Methane Jet into Oxidant Stream".FLOW TURBULENCE AND COMBUSTION (2015).