A simplified model of local flame structure in thin reaction zones regime

Abstract

In thin reaction zones regime, frequently localized flame quenching occurs, due to which a portion of reactant would mix with productions before burning. A simplified flame model, which takes account of this reactant–product mixing effect, was put forward. On the basis of this model, local flamelet characteristics were analyzed by both theoretical and numerical methods. The results show that flame structure and propagation could be notably influenced by reactant–product mixing. A thickened postflame high OH concentration zone and a double-peak profile of active radicals were predicted, which are in accordance with existing direct numerical simulation results but can’t be reflected by traditional models.