技术中心

【英文篇名】 Numerical simulation of smoke control modes in underground railway station fire 【作者中文名】 周汝; 何嘉鹏; 蒋军成; 【作者英文名】 Zhou Ru★; He Jiapeng and Jiang Juncheng★ Nanjing University of Technology; Nanjing; China; 【作者单位】 南京工业大学; 【文献出处】 暖通空调, Heating Ventilating 火灾; 烟气控制; 防烟空气幕; 挡烟垂壁; 【英文关键词】 underground railway station; fire; smoke control; smoke-preventing air curtain; ceiling screen; 【摘要】 提出了在楼梯口采用防烟空气幕来代替挡烟垂壁及速度不小于1.5m/s向下气流的烟气控制模式。建立了双层地铁车站的物理模型,采用CFD方法模拟比较了4种烟气控制模式的控制效果。结果表明,在楼梯口设置防烟空气幕不仅可以保证人员6min以上的安全疏散时间,而且减少了所需新风量,可以有效阻止火灾的进一步扩大和控制烟气扩散。 【英文摘要】 Puts forward a smoke control mode of applying smoke-preventing air curtain substituting for ceiling screen and down air flow with velocity no lower than 1.5 m/s at the landing of stairs.Establishes a physical model of a two-layer underground railway station,simulates and compares four smoke control modes by CFD.The results indicate that more than 6 minutes for safe evacuation can be guaranteed by the smoke-prevention air curtain and the quantity of fresh air is reduced compared with the conventional modes,t...