摘要
用FDS软件建立长廊型高层建筑火灾烟气运动模型,利用空气幕与正压送风在前室门前形成防烟缓冲区,分析影响空气幕防烟效果的射流角度及空气幕风量。设置空气幕距前室门前距离为2m,射流宽度0.07m,在不同的空气幕与正压送风比值下,空气幕射流角度在0°～30°范围内变化。比较各种模式下烟气的温度、体积分数分布及可视度变化,得出防烟缓冲区最佳设置模式为空气幕送风量与前室正压送风量比值为4∶1,空气幕射流角度0°。
A fire smoke movement model of long corridor in high-rise building was built by FDS, and by using the air cur tain and the positive air supply to form a smoke buffer in front of vestibule, the effect on smoke control by air volume and air jet angle of the air curtain was analyzed. The air curtain was set 2 m from the vestibule door with jet width of O. 07 m, and aftersetting different volume ratios of air curtain and positive air supply, the jet angles are in the range of0°-30°. The tempera ture, concentration and visibility of each mode were compared, which shows that the best smoke buffer settings mode of air curtain is the volume ratio of air curtain and positive air supply being 4 ： 1, and the jet angle of the air curtain being 0°.
出处
《消防科学与技术》
CAS
北大核心
2013年第10期1093-1096,共4页
Fire Science and Technology
基金
江苏省高校自然科学研究面上项目(11KJB620002)
关键词
高层建筑
空气幕
射流角度
送风量
数值模拟
high-rise buildings
air curtain
jet angle
air supplyvolume
numerical simulation
