不同火源位置对烟熏痕迹影响的FDS模拟研究

FDS Application to Smoking Trace in Fire Investigation

火灾烟气是火灾过程的重要物理现象之一,烟气中悬浮的烟气颗粒数目以及火场分布状态是判定火灾原因的重要影响因素,在火灾调查过程中担当着重要角色。采用FDS软件对烟熏痕迹的形成进行了模拟研究,采用大涡模拟方法对火灾现场进行了模拟再现,并通过模拟不同工况,对烟熏痕迹的形成进行分析说明,重点分析解决了火源不同位置如何对烟熏痕迹形成结果造成影响这一问题,同时作为火灾调查的方法之一,初步分析了墙面烟熏痕迹的形成规律。

The fire smoke is one of the important physics phenomenon in fire process,the amount of smoke pellets and fire smoke field are an important affecting factor to identify a fire cause,and plays an importance role in a fire investigation.This paper applies FDS research to smoking trace,adopting a numerical large eddy simulation（LES）,and through simulating different working conditions and the analysis of smoking formation of trace,this paper focuses on the problem of how fire starting point is related to form smoking trace,pointing out the pattern of the wall＇s smoking trace.