Effect of Heat Release on the Behavior of Reacting Mixing Layer

Abstract

The effect of heat release on flow-combustion interaction is investigated by the numerical simulation of a non-premixed, temporally developing reacting mixing layer. The chemical reaction considered is a binary, one-step, irreversible model. The results are obtained at different heat release parameters, showing, in qualitative agreement with the existing studies, that the growth of instabilities in the mixing layer is suppressed by heat release, and due to the overall effect of baroclinic and volumetric expansion, the well-created large-scale structures existing in the cases under low or no heat release are weakened and destroyed ; i.e., the rate of chemical product formation and the strength of vorticity decrease with the increasing rate of heat release.