Numerical simulation of smoke control and extraction in a two level underground railway station

By using a zone model, simulates the behaviour of smoke temperature, height, volume fraction of CO changing with time under different smoke control and extraction conditions in the station and introduces three critical conditions as a criterion for judging the effects of different smoke control and extraction methods. The results show that only supplying air to platform stairs and simultaneously extracting smoke of fire zone can a best safe evacuation environment in the station be maintained.