着火房间窗口宽度对烟溢流行为影响研究

发布时间：2018-03-17 06:03

  本文选题：烟气溢流　切入点：窗口宽度　出处：《消防科学与技术》2016年12期 　论文类型：期刊论文

【摘要】：为探究窗口宽度对高层建筑火灾窗口烟溢流行为变化的影响规律,以南京市某写字楼为模型,应用FDS对此高层建筑室内火灾时窗口烟气溢流的行为进行研究。火源位于房间中央,功率为1 500kW。改变窗口宽度,设置6个工况,分析窗口处气体的质量流率、温度、速度的变化。结果表明,不同窗口宽度下烟气溢流的行为符合一定的变化规律。随着窗口宽度的减小,窗口处中性面的高度抬升,流出烟气的质量流率减小,温度降低,并且发生烟溢流的时间推迟。通过理论分析计算验证了模拟结果。
[Abstract]:In order to investigate the influence of window width on smoke overflow behavior of fire windows in high-rise buildings, an office building in Nanjing was used as a model. The behavior of window flue gas overflow during indoor fire in this high-rise building is studied by using FDS. The fire source is located in the center of the room and the power is 1 500 kW. The window width is changed and six working conditions are set to analyze the mass flow rate and temperature of the gas in the window. The results show that the behavior of flue gas overflow at different window widths conforms to a certain variation law. With the decrease of window width, the height of neutral plane at the window rises, the mass flow rate of the outflow smoke decreases, and the temperature decreases. And the time of smoke overflow is delayed. The simulation results are verified by theoretical analysis and calculation.
【作者单位】： 南京工业大学安全科学与工程学院;南京工业大学江苏省城市与工业安全重点实验室;南京市消防支队;
【基金】：国家自然科学基金青年科学基金资助项目“风环境下高层建筑外开口烟气溢流行为与扩散特性研究”(51408306)
【分类号】：TU998.1
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本文编号：1623453