Study On The Fire Smoke Movement Of The Subway Train

Subway is densely populated concourse, once a fire accurs, it will cause disastrous casualty, and its social impact is huge。The fire safety issue of subway has become one of the most problems concerned by people。Now,in domestic, more than 30 cities have carried out the construction of Rail Transit。Therefore, with the development of the social economy of our country, studying the law of the subway fire smoke and proposeing the reasonable smoke control measures to improve the subway fire safety have a very important practical significance。There are two study methods about fire, which are experiments and simulations。Comparatively, with the advantages of less-comsuption, short-period and good-repetitiveness, the numerical simulation method have been adopted widely as the computer quick-developing。Now, there are many usual fire smoke simulation softwares, such as FLUENT, PHOENICS, FDS etc, they all have has advantages on the fire smoke simulation。The paper introduces the subway fire about its characteristics, causes, damages and status in quo of research in the world; determines the maximum heat release rate of fire。With the chengdu subway train as the research object, constructing the fire simulation model, Using FDS simulation software to simulate the smoke movement of the train in the tunnel in two cases which are to stopping, or continuing to run when it is on fire, Analysing the distribution of the temperature and visibility field, and the Radiant heat intensity changes with time, Finding the fire spreading laws, quantitative analysis of fire subway to reach a dangerous state of the time, proposing the smoke control measures in the subway train in the situation of the case that the train continues to run when on fire。...