An industrial gas turbine burner operating at a pressure of 3 bar is simulated using the sgs-
pdf evolution equation approach in conjunction with the Eulerian stochastic field solution
method in the context of Large Eddy Simulation. A dynamic version of the Smagorinsky
model is adopted for the sub-grid stresses and eight stochastic fields were utilised to
characterize the influence of the sub-grid fluctuations. The chemistry was represented by an
ARM reduced GRI 3.0 mechanism with 15 reaction steps and 19 species. The results show …

A analysis of the subgrid scale flame thickness in the LES framework is presented. The
influence of the subgrid flame thickness has been tested numerically on a swirl stabilized
flame using a flamelet formulation. The analysis introduces a non-dimensional number a,
characteristic for flame and the filter. The values of this number are computed for different
LES combustion models and lie in a wide range. The variations of the number a lead to
completely different flame dynamics showing the importance of subgrid flame thickness …