Experimental Study of Smoke Evacuation in a Model Tunnel.

摘要

The generation of smoke in fires is generally associated with reduction in visibility and exposure to toxic environments. In fires, reduction in visibility due to smoke often leads to a critical situation for escaping people. Due to toxic gases and high temperatures the situation may be very hazardous if people are not quickly able to find their way to a safe place. Since CFD models are commonly used in the design of escape routes in tunnels a reliable smoke model is essential. There is still a great lack of experimental data for verification of smoke spread calculations using CFD, especially in tunnels. The main objective of present study was to investigate the influence of longitudinal ventilation on the efficiency of thermal and mechanical ventilation in tunnels using exhaust shafts and to obtain experimental data for comparison with CFD models.