Study on Vertical Combination Smoke Control Model in High-rise Building Fire

摘要：

In high-rise building fire, a large number of pressurized fresh airs will be pressurized into the fire floor when smoke ventilation and prevention system is used. And the fresh air dilutes the smoke, which reducing the efficiency of mechanical smoke exhaust. The assumption that vertical composition smoke-control model (air curtain combined with pressurization) is put forward to control the smoke. The mathematic model of smoke flow in high-rise building and κ-ε three-dimension turbulence model with two equations are used, and the influences of smoke exhaust effect with different smoke control modes are analyzed by simulation and experiments. The simulation and experiments results show that: in strip corridor, air curtain can be effectively blocked before the smoke into the atria, but smoke control time is short relatively. While using air curtain combined with positive pressure, the smoke control time at least has an increase of 60 s, and this vertical composition smoke-control model has the same effect as atria pressurization, but the amount of fresh air required decreases by 1/3.

关键词： high-rise building fire smoke exhaust experiment numerical simulation

作者: ZHOU Ru HE Jiapeng JIANG Junchen LI Jingxian

作者单位: School of Urban Construction and Safety Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China Jiangsu Key Laboratory of Urban and Industry Safety, Nanjing 210009, Jiangsu, China

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 741-745

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）