Influence of open and closed windows on the vertical spread characteristics of fire

Emergency Management Science and Technology Pub Date : 1900-01-01 DOI:10.48130/emst-2022-0001

Kai Wang, Wei Zhao, Yuan Yuan, Yu Jianyao, Yanan Song, Peifeng Hu, Jingwei Huang

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引用次数: 1

Abstract

In order to systematically explain the spreading mechanism of vertical fire, Pyrosim software with fire dynamic modules is used to simulate the fire spreading characteristics in a five-storey residential apartment building. The vertical spread characteristics of fire, high-temperature smoke, and leap-frog behavior are analyzed by evaluating the distribution of pressure, temperature, and gas flow velocity in the studied numerical fire field. In addition, considering the possible cases of high-rise building fire in reality, the fire spreading characteristics of three different opening sequences of glass windows are given: (i) only the windows on the first floor are open; (ii) the windows are randomly opened by the high temperature of the glass; (iii) all glass windows from the first to the fifth floors are open. The simulation results show that an appropriate increase of turbulent flow in the low-level area can greatly reduce the fire temperature in the high-level area, which can provide a certain reference for the safety and design of building fire protection in the future. Influence of open and closed windows on the vertical spread characteristics of fire.

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开窗和闭窗对火灾垂直蔓延特性的影响

为了系统地解释垂直火灾的蔓延机理，利用带有火灾动力学模块的Pyrosim软件对某五层居民楼的火灾蔓延特征进行了模拟。通过对数值火场中压力、温度和气流速度分布的评估，分析了火灾的垂直蔓延特征、高温烟气和跃进行为。此外，考虑到现实中高层建筑火灾可能发生的情况，给出了三种不同的玻璃窗开启顺序的火灾蔓延特性:(1)仅打开一层窗户;(ii)窗户因玻璃的高温而随机打开;(iii)一至五楼的所有玻璃窗都是敞开的。仿真结果表明，适当增加低空区域的湍流，可以大大降低高空区域的火灾温度，可为今后建筑防火的安全和设计提供一定的参考。开窗和闭窗对火灾垂直蔓延特性的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Emergency Management Science and Technology

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