【摘要】 运用Pyro Sim软件,以某典型商业综合体室内步行街为对象建立模型,以一氧化碳浓度、烟气层温度、能见度、可用安全疏散时间为指标,分别设定九组工况进行烟气危险性数值模拟。对比分析了三组最不利工况条件下火灾烟气运动及特性参数变化情况,在此基础上分析得到火灾初期烟气危险性主要表现为烟气遮光性所带来的能见度的迅速下降。更多还原

【Abstract】 The paper uses the Pyro Sim software to model and simulates the smoke diffusion under fires in complex commercial indoor pedestrian streets. By setting nine different diffusion conditions and by using evaluation indexes of carbon monoxide,smoke layer temperature,visibility,available safety evacuation time,the fire smoke hazards in the early period of fire were evaluated. The smoke diffusion and characteristic parameters about three most unfavorable working conditions were analyzed. The simulation results indicate that the rapid decline of visibility because the smoke light- blocking is the main hazard in the early period of fire.更多还原