Description and Results of Furniture Fire Modules Within FAST (HEMFAST (Heat and Mass Transport of Furniture Fire, Smoke and Toxic Gases))

摘要

The Heat and Mass Transport of Furniture Fire, Smoke and Toxic Gases (HEMFAST) program simulated the furniture fire and the toxic gas growth in a room and its spread to the other rooms. This was achieved by incorporating an improved furniture fire model into the FAST model in current usage at NBS. The furniture fire model was designed to be self-controllable in simulating a fire source utilizing as inputs only the bench scale data of new scalable material burning rates, flame spreading, thermal ignition, and the flame properties of the following: soot volume fraction, CO2 and H2O mass fractions of fuel weight, and gas temperatures. Since the Hottels' zoning method was used in the thermal radiation model it was possible to consider surface emissivities less than unity on all surface elements, and to consider three isothermal gray gas volumes which are the high-temperature flaming plume, the sooty upper gas layer, and the lower gas layer at 50% relative humidity. Some salient features are noted in the simulation of a sample fire growth on a furniture mockup.