The present study is devoted to verify current capabilities of Large Eddy Simulation (LES) methodology in the modeling of lean\npremixed flames in the typical turbulent combustion regime of Dry Low NOx gas turbine combustors. A relatively simple reactive\ntest case, presenting all main aspects of turbulent combustion interaction and flame stabilization of gas turbine lean premixed\ncombustors, was chosen as an affordable test to evaluate the feasibility of the technique also in more complex test cases. A\ncomparison between LES and RANS modeling approach is performed in order to discuss modeling requirements, possible gains,\nand computational overloads associated with the former. Such comparison comprehends a sensitivity study tomesh refinement and\ncombustion model characteristic constants, computational costs, and robustness of the approach. In order to expand the overview\non different methods simulations were performed with both commercial and open-source codes switching from quasi-2D to fully\n3D computations.
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