Numerical studies of the interaction mechanism between the pilot flame and main flame

Abstract

The interaction mechanism between the rich premixed pilot flame and lean premixed main flame was investigate in this paper. A two-dimensional numerical model was adopted with detailed chemistry and species transport and with no artificial flame anchoring boundary conditions. The transport and reaction characteristics on the both sides of the main flame were analysed with the equivalence ratio via from 0.6 to 0.75. The results show that the radicals diffuse from the pilot flame to the reaction zone of the main flame, which contributing to the change of species concentration and chemical reaction rate. The pilot flame can the increase flame propagation speed, lowered the position of flame base and enhance the flame stability of the main flame.