主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (5): 618-623.

• • 上一篇    下一篇

风速对高层建筑凹型外墙火灾烟气扩散的影响

尹越13,周汝23,何嘉鹏13,李思成4,明壮13   

  1. 1.南京工业大学 城市建设学院,江苏 南京 210009; 2.南京工业大学 安全工程学院,江苏 南京 210009; 3.南京工业大学 江苏省城市与工业安全重点实验室,江苏 南京 210009; 4.中国人民警察大学,河北 廊坊 065000
  • 出版日期:2020-05-15 发布日期:2020-05-15
  • 通讯作者: 周 汝(1981-),男,南京工业大学安全工程学院教授。
  • 作者简介:尹 越(1995-),男,江苏南京人,南京工业大学城市建设学院硕士研究生,主要从事高层建筑防排烟研究,江苏省南京市鼓楼区中山北路200号土木综合楼503室,210009。
  • 基金资助:
    国家自然科学基金资助项目“溢流火作用下外立面金属夹心保温板特殊引燃机制及火蔓延行为研究”(51874183);灭火救援技术公安部重点实验室开放课题“风环境下高层建筑烟溢流行为与扩散特性研究”(KF201810)

Effect of wind speed on smoke diffusion of concave exterior wall fire in high-rise buildings

YIN Yue1,3, ZHOU Ru2,3, HE Jia-peng1,3,LI Si-cheng4, MING Zhuang1,3   

  1. 1. College of Urban Construction, Nanjing Tech University, Jiangsu Nanjing 210009, China; 2. College of Safety Science and Engineering, Nanjing Tech University, Jiangsu Nanjing 210009, China; 3. Key Laboratory of Urban and Industrial Safety, Nanjing Tech University, Jiangsu Nanjing 210009, China; 4. China People's Police University, Hebei Langfang 065000, China
  • Online:2020-05-15 Published:2020-05-15

摘要: 为研究环境风对高层住宅凹型外墙底部烟气扩散的影响,对高层住宅凹槽内火灾烟气温度、扩散速度、浓度等特性进行数值模拟。取外墙凹槽的侧墙长度与侧墙间距之比为结构因子,设置不同工况进行对比分析。结果表明:相同结构因子、不同风速下的各高度处温度符合指数分布;获得了烟气脱离建筑中部壁面的临界风速与结构因子的关系模型,为高层住宅凹型外墙尺寸设计提供参考。结构因子为1时底层窗户破裂时间相对最大。

关键词: 高层建筑, 凹型外墙, 风速, 结构因子, 烟气扩散

Abstract: To study the influence of ambient wind on smoke diffusion at the bottom of concave exterior walls of high-rise residential buildings, the characteristics of smoke such as temperature, speed and concentration in concave walls of high-rise residential buildings were simulated numerically. Take the ratio of the length of the side wall and the distance between the side walls of the groove of the outer wall as the structural factor, different working conditions were set for comparative analysis. It is found that the temperature at different heights of the same structural factor is exponentially distributed under different wind speeds.The relationship model between critical wind speed of flue gas leaving the central wall of the building and the size of the structural factor was obtained to guide the dimension design of concave exterior wall of high-rise residential buildings. The rupture time of the bottom window is relatively the maximum when the structural factor is 1.

Key words: high-rise building, concave exterior wall, wind speed, structural factor, smoke diffusion