Laminar flamelet approach has been successfully used to model turbulent combustion and emissions in gas turbine engines. In this paper, this approach has been extended to model water injection for NO{sub}x reduction. Rigorous formulation for modeling water injection introduces additional dimensions to the flamelet table that severely impacts the simulation turn-around time. Here a simple approach is adopted in which flame-quenching effect of water evaporation is applied as correction to the thermal field predicted by laminar flamelet approach for the dry case. The reaction rates of emission formation and oxidation are corrected based on activation energy terms. The model is demonstrated for a LM6000 single annular combustor engine that has marine, industrial, and power generation applications. Comparisons of predicted NO{sub}x and CO emissions with engine test data at maximum power level show reasonable agreement over a range of waterfuel ratios.
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