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Predicting of Fire Characteristics of Flame Retardant Treated Douglas fir Using an Integral Model  

Park, Hyung-Ju (Department of Safety System Engineering, Hoseo University)
Kim, Hong (Department of Safety System Engineering, Hoseo University)
Ha, Dong-Myeong (Department of Safety Engineering, Semyung University)
Publication Information
Journal of the Korean Society of Safety / v.20, no.3, 2005 , pp. 98-104 More about this Journal
Abstract
This study experimentally and theoretically examines the fire characteristics of 100- by 100- by 50-mm samples of flame retardant treated Douglas fir. Samples were exposed to a range of incident heat fluxes 10 to $50kW/m^2$. The time to ignition measurements obtained from the cone heater were used to derive characteristic properties of the materials. A one-dimensional integral model has been used to predict the, time to ignition, critical heat flux and ignition temperature of samples. Ignition data and best-fit curves confirm ${{\dot{q}}_i}^{ and when ${{\dot{q}}_i}^. And Ignition of flame retardant treated samples occurred not at incident heat flux of bellow $10kW/m^2.$. By a one-dimensional integral model, the critical heat flux of each samples was predicted $10.21kW/m^2,\;11.82kW/m^2,\;and\;14.16kW/m^2$ for the D-N, D-F2, and D-F4, respectively. In ignition temperature of each samples, flame retardant treated samples were measured high about $50^{\circ}C$ than non-treated samples. Water-soluble flame retardant used in this study finds out more effect in delay of time to ignition when incident heat flux is low than high.
Keywords
flame retardant; douglas fir; incident heat flux; time to ignition critical heat flux; ignition temperature; one-dimensional integral model; cone heater;
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