摘要
建立长20m的走廊模型,利用FDS分析不同施加方式下细水幕对于建筑走廊中烟气的阻断效果。设置4个火灾场景模拟走廊内温度、热释放量、烟气层高度、遮光率、CO2浓度及O2浓度。模拟结果表明:细水幕可以有效阻断烟气扩散,降低走廊的环境温度,稀释吸收有害气体。采用上下垂直施加细水幕可以有效降低走廊内烟气的温度和高度,增大走廊能见度,减缓氧气的下降速率。
This experiment established a model of 20 m long cor- ridor, used FDS to study the effects of water mist curtain bloc- king the smoke diffusion under different ways of applying water mist in the corridor of building fire. Four scenarios were set to simulate the temperature, heat release, smoke layer height, ob- scuration, C（）2 concentration and 02 concentration. The results showed that water mist curtain can effectively block the gas dif- fusion, rapidly decrease the environmental temperature, absorb and dilute toxic gas. Applying water mist curtain vertical up and clown at the same time can reduce the temperature and layer height of the smoke, increase the visibility of the corridor, slow down the consumption rate of oxygen.
出处
《消防科学与技术》
CAS
北大核心
2014年第1期29-33,共5页
Fire Science and Technology
基金
国家自然科学基金资助项目(51176070)
关键词
建筑走廊
细水幕
烟气运动
烟气温度
building corridor
water mist curtain
smoke mo-tion
smoke temperature
