Large-Eddy Simulation of Turbulent Combustion Using SOM and EBU SGS Combustion Models

Abstract

A second-order moment (SOM) combustion model proposed by the present authors, together with the EBU combustion model are used for large-eddy simulation of jet diffusion combustion, swirling diffusion combustion and premixed combustion behind a bluff body. The statistical results for time-averaged and RMS fluctuation temperature are validated by experimental results. Among them, the SOM combustion model can always give good statistical results, but the EBU combustion model cannot. The instantaneous results indicate that organized large vortex and thin flame surface structures are observed in jet diffusion combustion and bluff-body premixed combustion, whereas no organized vortex and thin flame surface structures are observed in swirling diffusion ombustion.