HOW LONGITUDINAL VENTILATION INFLUENCES FIRE SIZE IN TUNNELS

The results from a research project investigating the influence of longitudinal ventilation on fire size in tunnels have been published previously. The project was set up in such a way as to enable the results to be updated as and when new experimental data become available. In 2002 and 2003, a number of fire tests in tunnels were carried out. These experiments are summarized. The results from the original study have been updated using the data from these new experiments. The updated results predict that the influence of ventilation on the growth of a HGV fire in a tunnel may not be quite as great as had been previously reported. The new results also show minor variations from the original results for fully involved HGV fires, small pool fires and car fires. The results are presented and briefly discussed. (A)