A dynamic model for the turbulent burning velocity for large eddy simulation of premixed combustion

摘要: Turbulent premixed combustion is particularly difficult to describe using large eddy simulation (LES). In LES, flame structures typically exist on subfilter length scales. Consequently, LES models must be capable of describing how completely unresolved propagate under the influence eddies. This description usually accomplished through implementation a model for turbulent burning velocity. Here, dynamic velocity in context presented. uses new surface filtering procedure that consistent with standard filtering. Additionally, it only information comes directly from front. latter attribute important two reasons. First, guarantees can consistently applied when level set methods, where arbitrary constraints imposed field variables away fronts, are used track flame. Second, forces recognize physics governing front propagation valid locally at Results showing validation direct numerical (DNS), and application