摘要
为研究高层建筑或超高层建筑中室外风在玻璃破碎后对火焰特征的影响,运用FDS数值模拟方法,对风速为0～24m/s的17个自由燃烧算例进行了模拟研究,拟合了适用于较大室外风速条件下的火焰长度及其倾角计算公式,并与Dfaveri模型、Drysdale模型进行了对比分析。结果表明:室外风速增大会使火焰长度及其向上风向倾斜的角度减小,但会使火焰向下风向倾斜的角度增大。
Seventeen fire scenarios with different wind velocity from 0 to 24 m/s were calculated by FDS, to study the effects of wind on the characteristics of flame after glass broken in the high-rise building. According to the results of numerical simu- lation, the calculation model of flame length and tilt angle under the big wind velocity was obtained and compared with Dfaveri model and Drysdale model The results showed that： flame length and tilt angle upward the wind decreased but tilt angle downward the wind increased as wind speed increased.
出处
《消防科学与技术》
CAS
北大核心
2013年第9期939-941,共3页
Fire Science and Technology
基金
国家自然科学基金资助项目(51278493)
关键词
室外风
火焰长度
火焰倾角
FDS模拟
高层建筑
outside wind
flame length
flame tilt
FDS simula- tion
high-rise building
