地下商业街火灾中回燃现象的初步研究

对回燃这一特殊火现象的发生机理及研究现状进行研究分析,结合地下商业街发生火灾时烟气温度高、人员疏散困难等特性,对地下商业街火灾回燃现象进行了初步研究,分析了其发生的可能性及危害,指出可以通过控制送风风量和流速、降低可燃组分和控制点火源的措施来抑制回燃的发生,为进一步研究地下建筑火灾中烟气回燃现象提供参考。

Preliminary Study on the Backdraft in Underground Commercial Street Fire

The occurrence mechanism and present research situation of a special phenomenon backdraft is analyzed in this paper.Combined with the characteristics of underground commercial street such as high temperature smoke and evacuate difficult,the preliminary study is made on the backdraft phenomenon in fire;the possibility of its occurrence and harm is analyzed,measures such as controlling air velocity and flow velocity,reducing the flammable components and controlling fire seat are pointed out to suppress the backdraft to happen,which provides references for the further research on the backdraft phenomenon in the underground architectural fire.