| 中庭空间烟气蔓延对火灾探测的影响研究 |
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| 引用本文： | 马伟明,许磊.中庭空间烟气蔓延对火灾探测的影响研究[J].消防科学与技术,2020,39(12):1680-1683. |
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| 作者姓名： | 马伟明 许磊 |
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| 作者单位： | 1. 辽宁省消防救援总队，辽宁沈阳110032；2. 应急管理部沈阳消防研究所，辽宁沈阳110034 |
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| 基金项目： | 国家重点研发计划课题“木结构与大跨空间结构建筑火灾预警技术”(2018YFC0807604) |
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| 摘 要： | 针对建筑中庭不同顶棚高度下火灾烟气蔓延及感烟探测过程，基于火灾动力学模拟软件(FDS) 开展了数值模拟试验。研究了顶棚处温度及能见度云图的变化情况，并分析了不同高度条件下线型光束感烟探测、消光系数及温度值的参数曲线特征。结果显示，顶棚处减光率到达50%/m 的时间和顶棚高度存在较好的函数关系y=26.58 × 1.06x，对应的R 值为0.996；顶棚高度≥30 m 时，竖直布置线型光束火灾探测器也是一种较好的选择。该研究能够为中庭内消防工程设计及火灾探测报警系统的布置及设计提供技术支撑，提高建筑消防安全水平。
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| 关 键 词： | 中庭空间 烟气蔓延 火灾探测 数值模拟 |
Study on the influence of smoke spreading on fire detection in atrium space |
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| MA Wei-ming,XU Lei.Study on the influence of smoke spreading on fire detection in atrium space[J].Fire Science and Technology,2020,39(12):1680-1683. |
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| Authors: | MA Wei-ming XU Lei |
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| Affiliation: | 1. Liaoning Fire and Rescue Brigade, Liaoning Shenyang 110032, China; 2. Shenyang Fire Science and Technology Research Institute of MEM, Liaoning Shenyang 110034, China |
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| Abstract: | Mathematical
simulation is carried out to study the fire smoke spreading and detection
process of atrium with different ceiling heights. The temperature near the
ceiling and visibility cloud chart are studied. The parameters curve features
of linear beam smoke detection, extinction coefficient, and temperature with
different ceiling height are analyzed.Results showed that, when the time of
extinction rate near the ceiling reaching 50%/m and the ceiling height have
good functional relation of y=26.58 × 1.06x, R=0.996; when the
ceiling height is not less than 30 m, arrange the linear beam fire detector
vertically is a good choice. The study can provide technical reference for the fire
design of atrium and the arrangement of fire alarm system, and improve the
building fire safety level. |
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| Keywords: | atrium space smoke spread fire detection mathematical simulation |
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