Abstract
Recently, road tunnel in urban area tends to be complicated. In such a tunnel, various study for securing visibility environment for safe escape is necessary with regard to ventilation system. Therefore it is necessary to develop a ventilation control simulator and to examine control of longitudinal air velocity in the ventilation system. The simulator we have built is constructed with the solver of a set of ordinary differential equations with regard to the airflow velocities. In order to cope with the complexity of the tunnel topology, graph theory is introduced, in which the tunnel was modeled with links and nodes. We examined the air flow velocity by solving the differential equations. Simulation was carried out to clarify the behavior of longitudinal flow in fire under various ventilator operations, including imbalance operations, so that the airflow velocity can be properly manipulated for securing a safe evacuation environment. And, we report a. result applied to the Shinjuku Tunnel with the simulator we have built.
