A filtered tabulated chemistry model for LES of premixed combustion

Benoit Fiorina (1) , Ronan Vicquelin (1) , Pierre Auzillon (1) , Nasser Darabiha (1) , Olivier Gicquel (1) , Denis Veynante (1)

1 EM2C - Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion

A new modeling strategy called F-TACLES (Filtered Tabulated Chemistry for Large Eddy Simulation) is developed to introduce tabulated chemistry methods in Large Eddy Simulation (LES) of turbulent premixed combustion. The objective is to recover the correct laminar flame propagation speed of the filtered flame front when subgrid scale turbulence vanishes as LES should tend toward Direct Numerical Simulation (DNS). The filtered flame structure is mapped using 1-D filtered laminar premixed flames. Closure of the filtered progress variable and the energy balance equations are carefully addressed in a fully compressible formulation. The methodology is first applied to 1-D filtered laminar flames, showing the ability of the model to recover the laminar flame speed and the correct chemical structure when the flame wrinkling is completely resolved. The model is then extended to turbulent combustion regimes by including subgrid scale wrinkling effects in the flame front propagation. Finally, preliminary tests of LES in a 3-D turbulent premixed flame are performed.

Mots clés: Large Eddy Simulation; Turbulent premixed combustion; Tabulated chemistry

Domaines: Milieux fluides et réactifs; Mécanique des fluides [physics.class-ph]; Mécanique des fluides [physics.class-ph]

Benoit Fiorina, Ronan Vicquelin, Pierre Auzillon, Nasser Darabiha, Olivier Gicquel, et al.. A filtered tabulated chemistry model for LES of premixed combustion. Combustion and Flame, 2010, 157 (3), pp.465-475. ⟨10.1016/j.combustflame.2009.09.015⟩. ⟨hal-00472611⟩