This paper presents numerical simulations of two-dimensional laminar methan
e/air premixed jet flames with a detailed chemical kinetics mechanism. Comp
rehensive transport and thermodynamic physical properties for each species
and gas mixture are included and the nonunity Lewis number has been taken i
nto account for a nonuniform burning pattern of fuel-rich premixed flames.
The focal point of this work is to demonstrate the sensitivity of the model
ling of the detailed chemical kinetics on the flame temperature and concent
rations of major components for three different equivalence ratios. The tem
perature and major species distributions are in good agreement with the exp
erimental measurements by Nguyen et al., but the CO, OH and NO radical spec
ies profiles still deviate from experiments. The typical flame structure of
the steady jet premixed methane/air flame has been obtained. (C) 1998 Else
vier Science Ltd. All rights reserved.