基于FDS的某地下车库火灾烟气系统优化

Optimization of Fire Smoke System of an Underground Garage Based on FDS

通过FDS软件对某地下车库火灾烟气扩散进行数值模拟研究,在建立尽可能接近真实情况的物理模型的前提下,确定模型的热释放速率、排烟量以及模拟时间,分析排烟口的布置方式、排烟口风速、排烟口面积等3种不同条件对烟气层的发展和火灾控制的影响规律,得出了该地下车库不同火灾场景下的烟气浓度扩散、温度分布及可见度分布相应结论,为今后地下车库火灾烟气系统的优化设置提供了一定的参考和理论依据。

The diffusion of fire smoke system of an underground garage is simulated by using FDS in this paper.The heat release rate,smoke extraction volume and simulation time of the model are determined based on physical model as close to the real case. The diagram of flue gas diffusion concentration,temperature distribution,visibility distribution under different fire scenarios of the underground garage and related conclusions are gained by analyzing three different conditions such as the arrangement,the wind speed,the area of smoke vent on the influence rule of smoke layer development and fire control. The conclusions of this paper could provide theoretical basis and a certain reference value for the optimum design of fire and smoke system in underground garage in the future.