Extinction of Strained Premixed Propane-air Flames with Complex Chemistry

Abstract

—The structure of a strained premixed laminar propane-air flame is examined. The flame is formed in the neighborhood of the stagnation point produced by the counterflow of fresh mixture and hot combustion products. The governing conservation equations are solved numerically by employing adaptive continuation techniques. The model includes detailed transport and complex kinetics using a reaction scheme due to Warnatz. Flame structures, ignition regimes and extinction regimes are exhibited. The results are in excellent qualitative agreement with the asymptotic theory of Libby and Williams and can be used to develop a flame let description of turbulent premixed propane-air combustion.