Fire Protection Engineering
Permanent URI for this communityhttp://hdl.handle.net/1903/2241
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Item A Generalized Model for Wall Flame Heat Flux During Upward Flame Spread on Polymers(2015) Korver, Kevin; Stoliarov, Stanislav; Fire Protection Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)A current model accurately predicts flame to surface heat flux during upward flame spread on PMMA based on a single input parameter, the mass loss rate. In this study, the model was generalized to predict the heat flux for a broad range of polymers by adding the heat of combustion as a second input parameter. Experimental measurements were conducted to determine mass loss rate during upward flame spread and heat of combustion for seven different polymers. Four types of heat of combustion values were compared to determine which generated the most accurate model predictions. The complete heat of combustion yielded the most accurate predictions (± 4 kW/m2 on average) in the generalized model when compared to experimental heat flux measurements collected in this study. Flame heat flux predictions from FDS direct numerical simulations were also compared to the generalized model predictions in an exploratory manner and found to be similar.Item EVOLUTION OF FLAME TO SURFACE HEAT FLUX DURING UPWARD FLAME SPREAD ON POLYMETHYL METHACRYLATE (PMMA)(2011) Leventon, Isaac Tibor; Stoliarov, Stanislav I; Fire Protection Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)The heat feedback profile across 5cm wide, 15cm tall samples of PMMA is measured as a flame spreads vertically across its surface. Incident heat flux to a water cooled gauge is determined with peak values averaging to 36kW/m^2 across the height of the sample. This heat flux has been separated into its convective and radiative components and, at this scale, radiative heat transfer is shown to account for between 5 and 15% of total flame to surface heat flux. Based on these measurements, net heat flux into the pyrolyzing material can be determined. Correlations, expressed solely as a function of sample burning rate, predicting net heat feedback to the material's surface are developed.