摘要
本文开展环境风作用下建筑幕墙构型所形成的狭长夹层空间内保温材料(PU板)逆流火蔓延燃烧特性研究,探究不同侧向风速作用下火焰形貌、质量损失速率和近域温度场等典型特征参数变化趋势.结果表明,逆流火蔓延火焰形态由幕墙构型、烟囱效应和环境风等因素耦合决定,风速的存在使得热解前锋呈二侧式分布,板材表面气相火焰温度峰值降低.并且,板材熔融滴落的质量趋势与风速呈正相关,在重力和风力作用下液体燃料剥离原始火焰区,从而引发次生火灾的危险性增大.本实验的结论可作为建筑幕墙间火灾的预防和救援工作参考依据.
In this paper,the counter-current flame spread and combustion characteristics of thermal insulation material(PU plate)in narrow interlayer space formed by building curtain wall configuration under the effect of environmental wind are studied,and the variation trends of typical characteristic parameters such as flame morphology,mass loss rate and near-field temperature field under different lateral wind speeds are investigated.The results show that the flame shape of counter-current fire spread is determined by the coupling of curtain wall configuration,stack effect,and ambient wind.The existence of wind speed makes the pyrolysis front distribute in a two-side manner and the peak value of the gas phase flame temperature on the surface of the plate decrease.Moreover,the quantity of plate melting and dripping is positively correlated with wind speed.Under the action of gravity and wind force,liquid fuel separates from the original flame zone,thus increasing the risk of secondary fire.The findings of this experimental investigation can be used as a reference for fire prevention and rescue work between the building curtain walls.
作者
万露露
马鑫
王经纬
李旺
李浩瀚
何灿
夏雲飞
刘天昊
WAN Lu-lu;MA Xin;WANG Jing-wei;LI Wang;LI Hao-han;HE Can;XIA Yun-fei;LIU Tian-hao(School of Civil Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China;School of Environmental and Energy Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China)
出处
《内蒙古工业大学学报（自然科学版）》
2020年第4期312-320,共9页
Journal of Inner Mongolia University of Technology：Natural Science Edition
基金
国家“十三五”重点研发计划项目(2017YFC0803300)
安徽省高校协同项目(GTXXT-2019-027)
安徽省自然科学基金项目(190085QE250)。
关键词
建筑幕墙
环境风速
聚氨酯泡沫
夹层空间
燃烧特性
building curtain wall
environment wind speed
polyurethane foam
interlayer space
combustion characteristics
