摘要
通过1/2缩尺寸实验和FDS研究无风状态下防火挑檐对建筑外立面竖向火溢流蔓延的阻隔性能,实验结果与模拟结果吻合良好,验证了所建立模型的正确性。并应用FDS研究了室外风对防火挑檐竖向阻隔性能的影响。结果表明,在无风状态下,当防火挑檐的伸出长度为0.6m时,有效的阻隔开口溢出火羽流竖向蔓延;在室外风下,当室外风速为3m/s,风向为水平右侧吹风,窗槛墙高度为0.4m时,0.6m伸出长度的防火挑檐可继续有效阻隔火溢流的竖向蔓延。
The blocked performance of the fire canopy to vertical fire plume spread without wind was studied by external facade flame experiment of building with 1/2 scale and FDS numerical simulation. The experiment results were in good agreement with the simulation results, which verified the correctness of the model. The blocked performance of the fire canopy to verti- cal fire plume spread was studied under external wind by FDS. The results showed that when the extending length of the fire canopy reached 0.6 m, it could block the vertical spread of o- penings overflow fire plume effectively when there was no wind. With the horizontal wind on the right, when the speed of external wind reached 3 m/s and the height of windowsill wails reached 0.4 m, the fire canopy could still blocked vertical fire plume spread.
出处
《消防科学与技术》
CAS
北大核心
2016年第3期321-324,共4页
Fire Science and Technology
基金
国家重点基础研究发展计划项目(973计划)(2012CB719702)
中国人民武装警察部队学院优秀硕士毕业论文培育计划项目(YP201509)
关键词
建筑外立面
开口火溢流
防火挑檐
室外风
building exterior wall
openings overflow fireplume
fire canopy
external wind
