诱导通风系统用于地下车库排烟的数值模拟

Numerical simulation about smoke extraction of underground garage with inductive ventilation system

利用FDS模拟地下车库火灾时诱导通风系统的排烟效果,与自然排烟和风管式机械排烟进行对比。结果表明:火灾发生初期,诱导通风系统排烟车库内能见度在30m以上,温度在30℃以下;火灾发展蔓延阶段,诱导通风系统在火灾发生600s时能保证车库内大面积区域的能见度在20m以上,900s时西侧仍有部分区域的能见度在10m以上,800s时大部分区域2m高度处温度在30℃以下。

The smoke extraction of underground garage with in- ductive ventilation system was simulated by FDS to compare with natural smoke extraction and mechanical smoke extraction with wind pipe. The results show that the visibility is longer than 30 m and the temperature is lower than 30 ℃ in under ground garage with inductive ventilation system at the begin- ning of fire. The inductive ventilation system could insure the visibility of most area in garage bigger than 20 m at 600 s after burn up at spread stage. Part of garage has bigger visibility than 10 m at 900 s after burn up. Temperature of 2 m height at most area is lower than 30℃ at 800 s after burn up.