Taking the underground garage of a shopping mall as a reference,an experimental simulation model is built by using FDS Pyrosim.Under the condition of adopting the linkage of mechanical smoke exhaust system and automatic sprinkler system,the different fire positions of a single vehicle in the underground garage are studied,and their effects on the smoke flow law after the fire,the temperature,visibility and CO concentration of the fire site are analyzed.The simulation results show that the temperature is higher at the fire source and the corner of the underground garage.In the early stage of fire,no matter where the fire source is,the visibility at the fire source is higher than that at other locations.The CO concentration is higher at the fire source and the corner of the underground garage,and the opening of the spray will also increase the CO content.
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