Application of CFD Simulation in Long Mountain Tunnel Fire

Abstract:
The smoke spread and smoke exhaust scheme of subway train fire in long mountain tunnel was different from those in underground section. By establishing a large-scale unsteady model and using FLUENT software for three-dimensional simulation, the flow pattern of train fire smoke in long mountain tunnel was simulated. The influence pattern of smoke flow of the fire on the tunnel piston wind was obtained, which can guide the smoke exhaust design scheme. The smoke exhaust wind speed of subway long mountain tunnel should not only meet the requirements of critical wind speed and specifications, but also meet the requirements of restraining smoke reflux. At the same time, the specific requirements of personnel evacuation time of fire train are put forward. It provides simulation data and reference for the design of fire control and smoke exhaust scheme of subway long mountain tunnel, which is convenient to formulate reasonable ventilation and smoke exhaust scheme.