不同宽度及密度的保温材料EPS的火焰蔓延及燃烧特性

发布时间：2018-10-14 17:11

【摘要】：对密度为18和25 kg/m~3的保温材料模塑聚苯乙烯(EPS),在不同宽度下进行小尺寸燃烧特性实验,考察了池火区长度、火焰高度及火蔓延速度等.结果表明,EPS火焰蔓延过程中,火焰形态包括典型形态、逆向形态及重合形态;宽度为8 cm的试样火焰蔓延稳定性较差,逆向形态及重合形态更多.不同宽度、密度18 kg/m~3的EPS的平均池火长度均大于密度25 kg/m~3的EPS,主要是由于EPS密度越小其火蔓延速度越大.密度18 kg/m~3的EPS由于孔隙中空气的助燃作用,火蔓延速度约为密度25 kg/m~3的EPS的2倍.EPS材料表面火焰区平均火焰高度主要受宽度影响,而池火区平均火焰高度主要受池火区长宽比影响.
[Abstract]:The combustion characteristics of moulded polystyrene (EPS), with densities of 18 and 25 kg/m~3 at different widths were investigated. The length of the fire zone, the flame height and the fire spread rate were investigated. The results show that the flame morphology includes typical shape, reverse form and superposition form during EPS flame propagation, and the flame propagation stability of the sample with width of 8 cm is poor, and the reverse morphology and superposition morphology are more than that of the sample with a width of 8 cm. The average fire length of EPS with a density of 18 kg/m~3 is larger than that of EPS, with a density of 25 kg/m~3. The main reason is that the smaller the density of EPS, the faster the fire spread. The flame propagation rate of EPS with density of 18 kg/m~3 is about twice that of EPS with density of 25 kg/m~3 due to the effect of air combustion in the pore. The average flame height of the surface of EPS is mainly affected by the width of the flame zone. The average flame height in the pool fire area is mainly affected by the aspect ratio of the pool fire area.
【作者单位】：安徽工业大学建筑工程学院;武汉理工大学资源与环境工程学院;中国科学技术大学火灾科学国家重点实验室;
【基金】：国家重点基础研究发展计划(973)基金资助项目(编号:2012CB719702) 国家自然科学基金资助项目(编号:51206002) 火灾科学国家重点实验室开放基金资助项目(编号:HZ2012-KF04) 安徽省自然科学基金青年基金资助项目(编号:1608085QE113)
【分类号】：TU551;X932

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