Abstract
Numerical simulation is applied to analyze the counterflow premixed flame with chemical kinetics model. The change in the influence of flame stretch on flame structure by equivalence ratio φ(φ=0.55, 0.75, 0.95, 1.15) is investigated. Methane-air premixed gas with a temperature of 300K and atmosphere pressure is spouted from both planes. The spout velocities are changed from near laminar burning velocity to near extinction limit. As a result, the effect of the flame stretch is superior to Lewis number effect when φ is not very small and flame stretch rate is small. Moreover, it is shown that the tendency to the burning velocity, which is defined by the velocity in minimum point of velocity in direction of nozzle axis, do not have a positive correlation with heat release rate.
