摘要：To study the influence of inclination on flame spread on solid surfaces and improve the accuracy of the theoretical model to predict the flame spread rate through the detailed heat flux distribution in the solid surface, a set of numerical simulations of fire spread on corrugated cardboard surface at different angles (0° ≤ θ ≤ 30°) is carried out. The simulations are performed using FireFOAM, a large eddy simulation solver with a “wall-resolved” approach. Great attention is paid to the explanation for the acceleration of fire spread and the influence of angle on flame heat transfer. Less attention is paid to the numerical models except for the treatment of turbulence. The simulation results are in good agreement with the experimental data qualitatively and quantitatively. The results show that the change of flow field structure, especially the vortex leads to the flame attachment. Moreover, the flame attachment length increases with angle; especially at θ ≥ 20°, it also increases with time. Based on the analysis of the influence of angle on the heat flux distribution in the preheating zone, a modified fire spread model considering the surface temperature is established, which effectively improves the accuracy of predicting the fire spread rate at large inclinations.
关键词：Acceleration FireFOAM Heat transfer Flame attachment Inclined surface
