engleski

Turbulence modelling influence on ammonia combustion in an experimental premixed burner

The object of the present work is numerical study of various turbulence models on the ammonia combustion under practical industrial conditions. San Diego chemical kinetics mechanism was selected based on our previous study for the analysis. Sensitivity analysis included k-ɛ model with turbulence chemistry interaction, k-ζ-f model and LES model, all three under different equivalence ratios. Simulation results showed only minor influence of turbulence on the results, with LES model producing more accurate results beyond equivalence ratio of 1. On the other hand, it required increased computational efforts, so k-ζ-f model could be considered optimum when compromise between computational intensity and model accuracy is considered. It is expected that this study will contribute to enhance the current knowledge by providing new insights in ammonia burning conditions closely resembling those in industrial applications and consequently help to design real industrial burning systems.

ammonia combustion ; reduced chemical kinetics ; swirl burner ; numerical modelling

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