Investigation of the Temperature Beneath Curved Tunnel Ceilings Induced by Fires with Natural Ventilation

The distribution characteristics of the temperature below ceilings in curved tunnel fires have not been quantitatively studied. A small-scale was constructed this work to study maximum and longitudinal attenuation induced by a with natural ventilation. Different turning radiuses fire heat release rates were taken into account. results show that ceiling is hardly affected radius scenario where flame plume impinges on (strong-plume-driven). fire-induced tunnels are comparable those straight tunnels. Improved correlations proposed for condition strong-plume-driven jet, measured value experiment collapsed well. This may enhance understanding distributions fires.