Nam Seob Park, Sang Cheol Ko*
The Journal of Mechanical Science and Technology, vol. 25, no. 3, pp.713-719, 2011

Abstract : Large eddy simulation (LES) of turbulent premixed combustion flows over backward facing step has been performed using a dynamic sub-grid G-equation flamelet model. A flamelet model for the premixed flame is combined with a dynamic sub-grid combustion model for the filtered propagation of flame speed. The objective of this study is to investigate the validity of the dynamic sub-grid G-equation model in a complex turbulent premixed combustion flow. For the purpose of validating the LES combustion model, the LES of isothermal and reacting shear layer formed at a backward facing step is carried out. The calculated results are compared with the experimental results, and a good agreement is obtained.

Keyword : Large eddy simulation; Turbulent premixed flame; Dynamic sub-grid G-equation model; Backward facing step flow; Turbulent flame speed