Effects of gas and soot radiation on soot formation in a coflow laminar ethylene diffusion flame

被引:121
作者
Liu, FS [1 ]
Guo, HS [1 ]
Smallwood, GJ [1 ]
Gülder, ÖL [1 ]
机构
[1] Natl Res Council Canada, Combust Res Grp, Inst Chem Proc & Environm Technol, Ottawa, ON K1A 0R6, Canada
关键词
D O I
10.1016/S0022-4073(01)00205-9
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A computational study of soot formation in an undilute axisymmetric laminar ethylene-air coflow jet diffusion flame at atmospheric pressure was conducted using a detailed gas-phase reaction mechanism and complex thermal and transport properties. A simple two-equation soot model was employed to predict soot formation, growth, and oxidation with interactions between the soot chemistry and the gas-phase chemistry taken into account. Both the optically thin model and the discrete-ordinates method coupled with a statistical narrow-band correlated-K based wide band model for radiative properties of CO, CO2, H2O, and soot were employed in the calculation of radiation heat transfer to evaluate the adequacy of using the optically thin model. Several calculations were performed with and without radiative transfer of radiating gases and/or soot to investigate their respective effects on the computed soot field and flame structure. Radiative heat transfer by both radiating gases and soot were found to be important in this relatively heavily sooting flame studied. Results of the optically thin radiation model are in good agreement with those obtained using the wide band model except for the flame temperature near the flame tip. Crown Copyright (C) 2002 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:409 / 421
页数:13
相关论文
共 37 条
[1]  
[Anonymous], P COMBUST I
[2]  
Bradley D, 1984, P 20 INT S COMB PITT, P931
[3]   Predictions of soot and thermal radiation properties in confined turbulent jet diffusion flames [J].
Brookes, SJ ;
Moss, JB .
COMBUSTION AND FLAME, 1999, 116 (04) :486-503
[4]   Soot oxidation and agglomeration modeling in a microgravity diffusion flame [J].
Ezekoye, OA ;
Zhang, Z .
COMBUSTION AND FLAME, 1997, 110 (1-2) :127-139
[5]   PREDICTIONS OF RADIATIVE-TRANSFER FROM A TURBULENT REACTING JET IN A CROSS-WIND [J].
FAIRWEATHER, M ;
JONES, WP ;
LINDSTEDT, RP .
COMBUSTION AND FLAME, 1992, 89 (01) :45-63
[6]  
Frenklach M., 1994, Soot formation in combustion: Mechanisms and models, P162
[7]  
Frenklach M, 1984, Symp. (Int.) Combust, V20, P887, DOI DOI 10.1016/S0082-0784(85)80578-6
[8]  
Frenklach Michael., 1991, S INT COMBUSTION, V23, DOI DOI 10.1016/S0082-0784(06)80426-1
[9]  
GULDER OL, 2000, COMB I CAN SECT 2000
[10]   Effects of the Lewis number and radiative heat loss on the bifurcation and extinction of CH4/O2-N2-He flames [J].
Ju, YG ;
Guo, HS ;
Liu, FS ;
Maruta, K .
JOURNAL OF FLUID MECHANICS, 1999, 379 :165-190