2008 Volume 50 Issue 154 Pages 345-352
The methane-air counterflow twin-premixed flame of fuel lean mixture is investigated with chemical kinetics model. For the confirmation of the effect of equivalence ratio and flame stretch rate, the steady counterflow flames, in which the Lewis numbers of each species are fixed from 0.5 to 1.5, in addition to the case of using actual Lewis numbers, are calculated. As a result, when the Lewis number is fixed, the maximum heat release rate is influenced by Lewis number effect and the summation of heat release rate is influenced by the Lewis number and the incomplete combustion. The influences of flame stretch rate on flame structures of the counterflow premixed flame using actual Lewis number are changed in each equivalence ratio. Moreover, the determination of the burning velocity in counterflow premixed flame is investigated.
