| 侧向风速作用下聚氨酯泡沫双火源火蔓延研究 |
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| 引用本文： | 王经纬,万露露,李旺,何灿,李浩瀚,夏雲飞,马鑫.侧向风速作用下聚氨酯泡沫双火源火蔓延研究[J].中国安全生产科学技术,2020,16(6):98-103. |
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| 作者姓名： | 王经纬 万露露 李旺 何灿 李浩瀚 夏雲飞 马鑫 |
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| 作者单位： | (1.安徽建筑大学 土木工程学院，安徽 合肥 230601； 2.安徽建筑大学 环境与能源工程学院，安徽 合肥 230601) |
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| 基金项目： | * 基金项目: 安徽省自然科学基金项目（1908085QE250）；安徽高校协同创新项目（GXXT2019027-2）；国家“十三五”重点研发计划项目（2017YFC0803300)；火灾实验室开放项目（HZ2019-KF13）；安徽建筑大学校级科研项目（JZ192075） |
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| 摘 要： | 为探究环境风作用下逆向双点火源聚氨酯泡沫火蔓延及融合行为，开展多组对照实验并从材料传热机理角度分析侧向风速对火蔓延行为中火羽流形态、质量损失和辐射热流场等特征参数的影响。结果表明:风速与上述参数之间存在非线性关系。环境风效应使火焰被拉长且敷贴于预热区表面，增大预热区面积和热反馈；侧向风速的增加对FPU板材质量损失的影响逐渐弱化，且板材的熔滴率与风速呈正相关；无论侧向风是否存在，两侧逆向火焰融合后均达到整个蔓延过程中的峰值温度；风速的存在限制了火焰温度与辐射热通量峰值，也缩短了温度和辐射峰值出现的时间。
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| 关 键 词： | 高层建筑火灾 双点火源 保温材料 侧向风速 火蔓延 |
Study on fire spread of polyurethane foam with dual ignition sources under lateral wind speed |
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| WANG Jingwei,WAN Lulu,LI Wang,HE Can,LI Haohan,XIA Yunfei,MA Xin.Study on fire spread of polyurethane foam with dual ignition sources under lateral wind speed[J].Journal of Safety Science and Technology,2020,16(6):98-103. |
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| Authors: | WANG Jingwei WAN Lulu LI Wang HE Can LI Haohan XIA Yunfei MA Xin |
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| Affiliation: | (1.College of Civil Engineering,Anhui Jianzhu University,Hefei Anhui 230601,China;2.College of Environment and Energy Engineering,Anhui Jianzhu University,Hefei Anhui 230601,China) |
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| Abstract: | In order to investigate the fire spread and fusion behavior of polyurethane foam with the reverse dual ignition sources under the effect of ambient wind,multiple groups of controlled experiments were carried out,and the influence of lateral wind speed on the characteristic parameters such as fire plume shape,mass loss and radiant heat flow field in the fire spread behavior were analyzed from the perspective of heat transfer mechanism of the material.The results showed that there was a nonlinear trend between the wind speed and the above parameters.The flame was stretched and applied to the surface of preheating zone by the effect of ambient wind,which increased the area of preheating zone and the thermal feedback.The influence of the increasing lateral wind speed on the mass loss of the FPU board weakened gradually,and the molten drop rate of the board was also positively correlated with the wind speed.Regardless of the presence or absence of lateral wind,the peak temperature was reached after the fusion of the reverse flame on both sides during the entire spread process.The existence of wind speed restricted the peak values of flame temperature and radiant heat flux,and it also shortened the time for the peak values of flame temperature and radiation. |
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| Keywords: | high rise building fire dual ignition sources thermal insulation material lateral wind speed fire spread |
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