Pressure Distributions and Emergency Ventilation Control for Transversely Ventilated Road Tunnels

Abstract

In order to secure the safety of the people at a fire in road tunnels, it is important to get to know about the longitudinal air velocity and the pressure distribution in the tunnel that would occur at the fire. These two parameters make us understand how the smoke moves and expands with time and how pressure difference changes with time between the fire source and the evacuation areas, which is essential to think about the safety of the people. The paper shows that the authors have developed the equation of motion for transient situation in tunnels with transverse ventilation systems and added a sample of the transient changes of the longitudinal air velocity and pressure distribution at an emergency in a transverse ventilated tunnel with plural ventilation sections.