A FLAME-BUBBLE ANALOG AND ITS STABILITY

被引:8
作者
WEERATUNGA, S [1 ]
BUCKMASTER, J [1 ]
JOHNSON, RE [1 ]
机构
[1] UNIV ILLINOIS,URBANA,IL 61801
关键词
D O I
10.1016/0010-2180(90)90089-A
中图分类号
O414.1 [热力学];
学科分类号
摘要
Lean hydrogenair mixtures confined to a flammability tube can support "flame-bubbles"-very small, highly curved flames that rise because of buoyancy. An approximate description of the flow field associated with a single unbounded flame is provided by numerical solution of the Navier-Stokes equations for distributed heat sources rising at constant speed in a gravitational field. Zeldovich has proposed a theoretical model valid at 0 g (zero Reynolds number) but it has only unstable solutions. We describe a "flame-cap" model, valid for finite g, and suggest that the flow field is an essential stabilizing mechanism. © 1990.
引用
收藏
页码:100 / 109
页数:10
相关论文
共 14 条
[2]  
BUCKMASTER J, 1984, COMBUST SCI TECHNOL, V35, P287
[3]  
BUCKMASTER J, 1988, MATH MODELING COMBUS, P112
[4]  
BUCKMASTER J, 1983, LECTURES MATH COMBUS, P73
[5]  
BUCKMASTER JD, 1985, MATH COMBUSTION, P26
[6]   SPHERICAL FLAME INITIATION - THEORY VERSUS EXPERIMENTS FOR LEAN PROPANE-AIR MIXTURES [J].
CHAMPION, M ;
DESHAIES, B ;
JOULIN, G ;
KINOSHITA, K .
COMBUSTION AND FLAME, 1986, 65 (03) :319-337
[7]  
Goldmann F, 1929, Z PHYS CHEM B-CHEM E, V5, P307
[8]  
KRAUSE JR, 1985, 23RD NAT HEAT TRANSF, P171
[9]  
LEWIS B, 1961, COMBUSTION FLAMES EX, P314
[10]  
RONNEY P, COMMUNICATION