颗粒形状对热颗粒点燃聚苯乙烯泡沫的影响  

Effect of Particle Shape on the Ignition of EPS Foam by Hot Particle

作　　者：张春寅 王凯锋 王苏盼 ZHANG Chunyin;WANG Kaifeng;WANG Supan(College of Safety Science and Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学安全科学与工程学院,南京211816

出　　处：《工程热物理学报》2025年第2期679-685,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52176113);国家重点研发计划(No.2023YFC3081600);江苏省高校重大项目(No.21KJA620003)。

摘　　要：本文就不同形状热颗粒对以聚苯乙烯泡沫为代表的建筑外墙保温材料进行了点火实验研究。实验中,使用了质量相近的球形、正方体和不同长径比的圆柱体不锈钢颗粒,在940~1030℃的实验范围内对EPS泡沫燃料床进行了点火实验,得到了颗粒形状对其点火规律的影响规律。通过传热传质理论分析,得到了不同形状热颗粒点火的点火机理。In this study,we conducted experiments to investigate the ignition of polystyrene(EPS)foam,a classic type of building external wall insulation materials,by hot particles of various shapes.Stainless steel particles with comparable masses and different shapes,including spheres,cubes,and cylinders with varying aspect ratios,were employed to ignite an EPS foam fuel bed with the temperature range of 940~1030℃.The study revealed the effect of particle shape on the ignition process.Through the analysis of heat and mass transfer theories,the mechanisms of the ignition by hot particles with various shapes were elucidated.

关 键 词：飞火 热颗粒 聚苯乙烯泡沫 森林火灾 建筑火灾 

分 类 号：O643.2[理学—物理化学]