Study Of Subway Fire And Ventilation System

With the population of the city in the world quickly increasing, thereare such problems: the transportation to hustled, the pollution of theenvironment and energy crisis, etc. Because of the carrying capacity big,free from pollution, the quicker speed, on time, comfortable, theconvenience and saving energy, subway is soon developing .At the same time,the problem of a fire in the subway also increasingly causes people'sextensive concern. Because the subway environment differs from that inthe building, also is not the same as that of underground building,therefore, this problem has nowadays become the focus. Airiness in theenvironment and a fire problem arose the attention early in the abroad,the research almost covers all the aspects. However, because of all kindsof factors, the related research on the problem lag behind in China. The city in China already having the subway or have started toconstruct subway: Peking, Shanghai, Guangzhou, Tianjin, Dalian,Shenzhen , Nanjing, Wuhan, Chongqing, Changchun etc.. Formally bringingup to hope of the developments have : Chengdu, Hangzhou, Shenyang, Xi'an,Haerbin, Qingdao, Suzhou, etc.. Therefore, this text now put the tunneland the typical station( the white stone bridge stand)of the Peking subwayNo.4 line in the point of the research. The fire about 14 m island typicalstation devided into taking account of the piston or not. It is the first time in China that the system is divided into the airin the subway environment into the tunnel and the station, studying themwith one dimensional and three dimensional software. Using the maturesoftware Subway Environment Simulation(SES) to study a fire in the tunnel,giving out the result of the normal movement mode. It provides the boundaryconditions for three dimension calculation. Making use of CFD to simulatea fire in the station. It's obtained the smoke expansion in the fire underdifferent ventilation term.. It is the valuable reference for the subwayto construct. The method to study is numerical simulation. Through some simplifying,and simulating, the expansion of the smoke during the fire are gotten.