摘要
为研究扁平大空间建筑两个相邻防烟分区采用不同排烟模式的可行性,基于FDS数值模拟,对比分析起火位置、排烟模式以及排烟补风对烟气温度分布、烟气层高度以及气流质量流量的影响,探讨扁平大空间建筑相邻防烟分区采用不同排烟模式的可行性。结果表明:单一自然排烟模式的排烟效果最佳;外窗有效排烟面积为地面面积3.16%的复合排烟模式排烟效果优于单一机械排烟模式;机械排烟模式扰乱烟气分层,防烟分区间气流交换更加剧烈,不利于人员安全疏散;挡烟垂壁能够有效蓄烟并延缓烟气蔓延,将高温烟气限制在起火分区。
In order to study the feasibility of adopting different smoke exhaust modes in two adjacent smoke control zones of flat large space buildings,based on FDS,the effects of fire location,smoke exhaust modes,smoke exhaust and air supplement on smoke temperature distribution,heat layer height and airflow mass flow are compared and analyzed,and the feasibility of adopt-ing different smoke exhaust modes in adjacent smoke control zones of flat large space buildings is discussed.The results show that the single natural smoke exhaust mode has the best smoke ex-haust effect;The smoke exhaust effect of the compound smoke exhaust mode with the effective smoke exhaust area of the exter-nal window of 3.16%of the floor area is better than that of the single mechanical smoke exhaust mode;The mechanical smoke exhaust mode disturbs the smoke stratification,the airflow ex-change between smoke control zones is more intense,and the temperature is higher on the height of personnel characteristics,which is not conducive to the safe evacuation of personnel;The smoke retaining vertical wall can effectively store smoke and de-lay the spread of smoke,and limit the high-temperature smoke in the fire zone.
作者
谢元一
黄晓露
Xie Yuanyi;Huang Xiaolu(Sichuan Fire Science and Technology Research Institute of MEM,Sichuan Chengdu 610000,China)
出处
《消防科学与技术》
CAS
北大核心
2024年第10期1408-1412,共5页
Fire Science and Technology
基金
应急管理部四川消防研究所基本科研业务费专项资金资助项目(20238804Z)。
关键词
扁平大空间
防烟分区
排烟模式
排烟量
有效排烟面积
数值模拟
flat large-scale space
smoke control zone
smoke ex-haust mode
smoke exhaust volume
effective smoke exhaust area
numerical simulation
