Abstract:
The reasonable prevention and control of smoke in subway fire was investigated in case of fire and docking at the platform. The physical model of the subway car and platform, the ventilation and smoke exit position of the platform and tunnel, and other parameters set up were set up. The numerical simulation of smoke flow under three different smoke exhaust modes is carried out. The simulation results of smoke visibility, temperature field and CO
2 concentration field are analyzed and compared and the optimal smoke exhaust combination scheme is put forward. The results show that the smoke can be discharged simultaneously if the smoke exhaust device of the platform and tunnel are put on. Smoke concentration is thus relatively low and the ambient temperature is low, while the concentration of CO
2 in the carriage and the platform is low and the impact on the vision and respiratory system in the process of escape is relatively less. Therefore, the mode of simultaneously opening smoke exhaust device at the tunnel and platform is the optimal plan, which results in the highest smoke exhaust efficiency and provides the best smoke exhaust effect. The results provide a theoretical basis for the prevention and control of smoke in subway fire and provide a guarantee for evacuation of subway personnel.