This paper presents the application of a detailed combustion model for turbulent premixed combustion to a swirl-stabilized premix burner. Computations are carried out for atmospheric pressure and elevated pressure of 9 atm. Results of computations for atmospheric pressure are compared to experimental data. The combustion model is of the joint-pdf type. The model is based on the characteristics of turbulent combustion under conditions typical for gas turbine burners. It incorporates a systematically reduced six-step reaction mechanism yielding direct computation of radical concentrations via transport equations or steady-state assumptions. The model is able to simulate combustion of fuel gases containing methane, carbon monoxide, hydrogen, carbon dioxide, and water. It is therefore applicable to both methane and low-BTU fuel gas combustion. Based on computed radical concentrations, a post-processor for NOx formation is applied. This post-processor considers thermal formation of nitrogen oxides and NO formation via the nitrous oxide path.

Issue Section:
Gas Turbines: Combustion and Fuels
Keywords:
combustion, flames, chemically reactive flow, turbulence, nitrogen compounds, oxygen compounds, fuel, swirling flow
Topics:
Combustion, Computation, Flames, Nitrogen oxides, Pressure, Turbulence, Gas turbines, Atmospheric pressure, Methane, Flow (Dynamics), Swirling flow
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