LAMINAR FLAME PROPAGATION WITH VOLUMETRIC HEAT-LOSS AND CHAIN BRANCHING-TERMINATION REACTIONS

Authors
Citation
Bh. Chao et Ck. Law, LAMINAR FLAME PROPAGATION WITH VOLUMETRIC HEAT-LOSS AND CHAIN BRANCHING-TERMINATION REACTIONS, International journal of heat and mass transfer, 37(4), 1994, pp. 673-680
Citations number
10
Categorie Soggetti
Mechanics,"Engineering, Mechanical",Thermodynamics
ISSN journal
00179310
Volume
37
Issue
4
Year of publication
1994
Pages
673 - 680
Database
ISI
SICI code
0017-9310(1994)37:4<673:LFPWVH>2.0.ZU;2-C
Abstract
The steady propagation of the planar laminar premixed flame in the dou bly-infinite domain, with chain branching-termination reactions and we ak volumetric heat loss, is studied using activation energy asymptotic s. Two flame propagation regimes are identified and analyzed: a fast r ecombination regime in which the recombination reaction occurs in a st eady-state manner with the high-activation-energy branching reaction i n an overall reaction region which is much thinner than that of diffus ion, and an intermediate recombination regime in which the recombinati on region is much thicker than the branching region but much thinner t han the diffusion region. The analysis yields the characteristic dual solution, extinction turning point flame response, and shows that the flame propagation speed is reduced to e-1/2 of the adiabatic value for both reaction mechanisms. The generality of this limit flame speed is noted.