LES of a turbulent premixed swirl burner using the Eulerian stochastic field method

A turbulent premixed swirl burner 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. Simple gradient diffusion models are adopted for the sub-grid stresses and eight stochastic fields were utilised to characterise the influence of the sub-grid fluctuations. The chemistry was represented by an augmented reduced mechanism derived from GRI 3.0 with 15 reaction steps and 19 species. Statistical means and instantaneous quantities show overall good agreement with the experimental data and demonstrate the capability of the pdf method in LES to simulate premixed combustion in complex flame configurations.