UPWARD FLAME SPREAD AND IGNITION ON INCLINED SURFACES OF THIN AND THICK SOLIDS

摘要

Experiments and CFD simulations have been carried out to investigate the effect of inclination onthe rate of upward flame spread over combustible solids. The experimental flame spread characteristicsand flame spread rates where measured and compared for thin and thick solids. The experimental flamespread rate increased with increasing inclinations as the flame interaction to the surface changed. Criticalangles where found to be at an inclination of 20-30° and 50-60°. The experimental data where used forvalidating CFD simulations. First simulations with the CFD model FDS show limitations in simulatingflame spread and ignition for small fires (low HRR) like in the early stage of fires.