Numerical Simulation Research on Smoke Exhaust Effect of Different Smoke Exhaust Schemes under Fire Condition of Subway Station Platform
To study the smoke-exhaust effect of the fire of the fully enclosed island platform of the underground station,by utilizing the software LES(Large Eddy Simulation)of FDS(Fire Numerical Simulation),the fire scene of the platform of a subway station in Chengdu was numerically simulated under the four smoke-exhaust conditions:opening the sliding doors at the front and rear of the platform screen door,setting up independent and auxiliary smoke-exhaust-ducts,installing exhaust vents on the rail-overhead-duct and the composite screen door.Based on the simulation results,the indices of temperature,mass concentration of CO,visibility,and other indicators at both the overall and local escape points within the platform are emphatically studied and analyzed.It is found that:the smoke exhaust mode of composite screen doors can quickly remove smoke from the platform,effectively improve the escape environment when a fire occurs on the platform and provide more time for personnel evacuation in a fully enclosed island platforms of the underground stations.
Fully enclosed screen doorRail top air ductSide air outletComposite screen door
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