The Numerical Simulation Study Of Fire Scenario In An Underground Garage By FDS

With the development of the society, car ownership continues to increase, and urbanparking difficulty has become a social problem. As a result, the underground garage hasbecome more and more important public facilities.Due to limited space of the underground garage, import and export is not much, naturalventilation is poor. In the event of fire, it will cause huge personnel and property losses. Soresearching the development regularity of fire as well as fire protection measures is of greatsignificance to the effect of the fire.This paper uses the FDS to set up a simplified three-dimensional model of a large garage.It studies the three kinds of fire scenario, which includes no exhaust system, exhaust systemand exhaust system+water spray. The article mainly analyzes the development rule of fluegas under different scenarios, and the change rule of fire parameters such as temperature, gasconcentration and visibility etc. Based on this, it inspects smoke and spray facilities for firecontrol effect. All numerical calculations are completed by advanced computing center in theXihua University.Results show that: exhaust system can discharge high temperature and toxic gases,reduce smoke concentration and improve visibility effectively. Automatic water sprayequipment mainly reduces heat release rate, and make smoke flow near the ceiling, whichcontrol the fire temperature very well. Combined with mechanical smoke exhaust system, itcan better control the development of fire and effectively put out the initial fire. This studyprovides reference for fire safety design and assessment, which is of great significance toreduce casualties and property losses caused by the fire of underground garage.