A Three Dimensional Dynamic Field Simulation of Smoke in Subway Station Fire

Because of rapid development of subway in China, fire prevention and safe evacuation in subway station become an important research topic. In order to investigate the rule of smoke development and movement, a physical model of a two-layer subway station is established in the text based on most subway station in China. A three dimensional dynamic field simulation of smoke movement is accomplished through CFD, in which the Rosseland radiation model is adopted. The fire source is set as one the exothermic of which is changing with time. The results indicate that the subway station would fill of smoke in six minutes without mechanical ventilation and passengers could not be safely evacuated within the time limit. This study provides theoretical basis for smoke control and passenger evacuation during the fire of a subway station.