The ability to accurately simulate the reduction in Actual Delivered Density (ADD), known as the penetration ratio, in the presence of a fire plume was the purpose of this study. FireFOAM, a computational fluid dynamics (CFD) code for simulating fire suppression, was validated by first simulating the fire plume generator in the absence of sprinkler spray and comparing against measured ceterline velocity and temperature profiles. Next, the spray model was validated by comparing against measure data for a sprinkler (K11.2), placed 3.05 m above the fire-plume generator. A pressures of 0.76 was used. Water collection data was compared to simulated results for sprinkler spray in the absence of a fire plume in order to establish a baseline. Finally, results for water collection in the pans below the fire-plume generator were compared for the various pressures and heat release rates of 2 MW (conv.). The results of this study demonstrate that FireFOAM has the ability to accurately predict the spatially distributed ADD and qualitatively predict the effect of the fire plume on the penetration ratio. However, some deficiencies in the modeling result in an under-prediction for the penetration ratio. These deficiencies have been identified and an approach forward has been proposed.
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