地下建筑不同机械补风条件对排烟效果的影响

The effect on smoke evacuation With a mechanical makeup air of underground construction

地下商业建筑必须通过设置机械补风和机械排烟来控制火灾发生时烟气的流动,以达到人员安全疏散的目的。以某一大型地下建筑的一个防火分区为基础,对其在相同的排烟条件下,不同机械补风条件的排烟效果进行了数值模拟分析,指出了要达到良好的排烟效果的条件。

Underground commercial buildings must be completed by setting up machinery and mechanical exhaust air to control the smoke movement in fire ,so as to achieve the purpose of the safety evacuation. Based on a fire prevention cent area in aunderground commerical building, this study is aimed at the effect on smoke evacation with a mechanical makeup air. The numerical simulations are applied to analyse the characters of fire smoke movement in underground construction. Meanwhile, the numerical simulations evaluate the effect on smoke evacution. Analying this ,it is suitable that the rate of mechanical makeup air is not more than 2 m/s.