高校宿舍走廊宽度对火灾烟气流动性影响的数值模拟

Numerical Simulation of the Influence of Corridor Width on Fire Smoke Fluidity in University Dormitory

利用FDS数值模拟软件,建立不同走廊宽度的三组全尺寸高校宿舍标准层模型,对其进行火灾动态模拟,主要测量了火灾过程中的烟气温度、CO浓度、能见度、烟气层的高度和烟气中CO_(2)浓度等参数,并对模拟结果进行了分析.结果表明:火灾发生后,烟气在短时间内开始聚集,迅速向走道两端开始蔓延,出现在走道两端烟气中各参数值高于中间区域的现象;不同走廊宽度对烟气层高、CO_(2)浓度的影响不大;在能见度和温度方面,走廊越宽,能见度越大,烟气温度越低;在CO浓度方面,在相同高度处,走廊越宽,CO浓度反而越大.综合这些因素,在新建宿舍时,建议走廊宽度选取为1.8m.

Using the FDS numerical simulation software,three sets of full-size university dormitory standard floor models with different corridor widths are established,and the fire dynamic simulation is carried out.The main parameters of the model are the smoke temperature,CO concentration,visibility,the height of the smoke layer and the CO_(2)concentration in the smoke during the fire process;The simulation results are analyzed.The results showed that after the fire,the smoke began to gather in a short time and spread rapidly to both ends of the aisle,and the parameters in the smoke at both ends of the aisle were higher than those in the middle area;Different corridor widths have little influence on the smoke layer height and CO_(2)concentration;In terms of visibility and temperature,the wider the corridor,the greater the visibility and the lower the flue gas temperature;In terms of CO concentration,at the same height,the wider the corridor,the higher the CO concentration.Considering these factors,it is suggested that the corridor width should be 1.8m when building new dormitories.