A thickened flame model for large eddy simulations of turbulent premixed combustion

摘要: A subgrid scale model for large eddy simulations of turbulent premixed combustion is developed and validated. The approach based on the concept artificially thickened flames, keeping constant laminar flame speed sl0. This thickening simply achieved by decreasing pre-exponential factor chemical Arrhenius law whereas molecular diffusion enhanced. When thickened, combustion–turbulence interaction affected must be modeled. point investigated here using direct numerical flame–vortex interactions an efficiency function E introduced to incorporate effects in model. input parameters are related turbulence (velocity length scales). An efficient approach, similarity assumptions, extract these quantities from resolved velocity field. specific operator exclude dilatational part field estimation of...