高层建筑走廊排烟口与挡烟垂壁组合控制烟气的研究

• 作 者: 李静娴 何嘉鹏 许小磊
• 机 构: 南京工业大学城市建设与安全工程学院,江苏省城市与工业安全重点实验室,
• 出 处: 建筑科学
• 发表日期: 2011年02期
• 关键词: 高层建筑 火灾 条形走廊 挡烟垂壁 组合控制

高层建筑发生火灾时,走廊是烟气扩散的重要途径,同时也是人员逃生的必经之路。本文通过建立高层建筑内烟气流动的数学模型,采用k-ε两方程三维紊流模型,利用FLUENT软件对高层建筑火灾时不同排烟方式下的机械排烟进行了模拟,对比分析了高层建筑条形走廊内不同排烟口与挡烟垂壁之间的距离,以及不同挡烟垂壁高度情况下走廊内烟气的扩散状况。结果表明,在高层建筑条形走廊内设置挡烟垂壁能够较好地降低挡烟垂壁下游走廊内的危险性;挡烟垂壁与排烟口之间的距离对排烟的影响不大,挡烟垂壁的下垂高度是影响排烟效果的关键因素;垂壁下垂高度每增加0.2 m,其下游平均温度将减小10℃左右。

In the event of a fire in a tall building, the corridor is an important route for the spread of flue gas and is also the only way for people to escape. In this paper, through the establishment of a mathematical model of smoke flow in high-rise buildings, using the k-ε two-equation three-dimensional turbulence model, the use of FLUENT software for high-rise building fire exhaust smoke exhaust mode were simulated, contrasting high-rise buildings The distance between different exhaust vents in the corridor and the vertical wall of the smoke blocking wall, and the diffusion of smoke in the corridor under the different height of the smoke blocking wall. The results show that the installation of smoke retaining walls in the high-rise corridor can reduce the risk of corridor in the downstream of the wall. The distance between the wall of the smoke retaining wall and the exhaust vents has little effect on the exhaust smoke , The height of the vertical wall of the smoke blocking wall is the key factor that affects the smoke exhausting effect. When the vertical wall droop height is increased by 0.2 m, the average temperature of the downstream wall is reduced by about 10 ℃.