真实大空间建筑物火灾场模拟研究

根据一真实火灾调查报告设定了真实大空间建筑物开口情况和材料燃烧性能参数,建立了FDS(Fire Dy-namics Simulator)物理模型。计算了火灾释热速率以及着火大空间烟气的温度场和一氧化碳浓度场的变化。研究结果表明:火灾短时间发生轰燃,随后发生回燃。轰燃是导致大量人员死亡的1个重要原因;回燃没有引起各点烟气的温度和一氧化碳浓度显著的提高,但对各点烟气的温度和一氧化碳浓度的保持起到较大作用。

Field Fire Simulation for Real Building with Large Space

This paper enacts ventilation condition and combustibility of materials in a real building with large space basing on a fire investigation report and establishes a FDS physical model. Heat release rate of the fire is calculated and the distribution of temperatures and concentration of carbon monoxide of smoke are discussed. Flashover and backdraft occur in the fire respectively. The authors suggest that the flashover might be a important reason resulting in more people's death in the fire. The temperatures and concentration of carbon monoxide of smoke are not increased when the backdraft occur, but not declined because the backdraft have an effect on it.