室外风对火焰特征影响的数值模拟研究  

Numerical study of wind effects on the characteristics of flame

作　　者：梁振涛[1] 李思成[1] 陈旺海涛[1] 李昌厚[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000

出　　处：《消防科学与技术》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)

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.

关 键 词：室外风 火焰长度 火焰倾角 FDS模拟 高层建筑 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]