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Turbulent premixed stoichiometric methane-air flames modeled with reduced kinetics have been studied using the direct numerical simulation (DNS) approach. The simulations include a four-step reduced mechanism for the oxidation of methane and the molecular transport is modeled with Lewis numbers for individual species. The effects of strain rate and curvature on the intermediate radical concentrations...
Three-dimensional direct numerical simulations (DNS) of turbulent nonpremixed flames including finite-rate chemistry and heat release effects were performed. Two chemical reaction models were considered: (1) a single-step global reaction model in which the heat release and activation energy parameters are typical of combustion applications, and (2) a two-step reaction model to simulate radical production...
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