Implications of a flame surface density approach to large eddy simulation of premixed turbulent combustion

摘要: Abstract Large eddy simulation (LES) is now widely regarded as an improvement on existing computational fluid dynamics (CFD) techniques in addressing classes of combustion problems where traditional CFD approaches have experienced some difficulty 1 , 2 3 . This particularly true situations there significant unsteadiness that characterized by large-scale flow-flame interactions. The flame surface density (FSD) approach to the modeling premixed turbulent well established context Reynolds-averaged simulations, and has shown potential a technique for LES [4] In this paper, results are presented using model Hawkes Cant propagation test case further demonstrates feasibility approach. Firstly, response variations turbulence intensity examined, assessment relative importance source terms balance equation FSD made. Secondly, it how can exploit effects coherent structures prediction through analysis resolved strain term. Lastly, behavior under filter size examined. It essential but difficult models independent size. responds expected. An increase decrease wrinkling, sub-grid wrinkling. net rate be largely chosen