Study on smoke propagation and control of a typical fire scenario in the subway

Subway is a modern urban rail transport.Subway system,which has undertaken greater task of passenger transportation than ever before,becomes an important symbol of urbanization.With the rapid development of subway system,subway disasters attach people's attention more and more because it is crowded places and the space in the underground.In recent years,subway fire had been more and more focused in fire field.In accordance with the characteristics of the subway fire,the specific circumstances of the subway fire scene were designed.Three dimensional numerical simulation of smoke flow and heat transfer process during the fire in a subway station was carried out by fire simulation software FDS,and the results were analyzed.A predictive analysis on the smoke distribution and air flow during a fire in accordance with the smoke suppression and exhaust system installed in the public area of the station was conducted,and it was pointed out that the reliability of the smoke suppression and exhaust system is most important to guarantee the capability of passenger evacuation during a fire.Without smoke management system,the safety evacuation from the platform to the station hall can not be ensured,especially when fire happens in the middle part of the platform.The purpose of this article is to provide some references for its advanced research.