Safety distance for preventing hot particle ignition of building insulation materials

查看全文 作　　者：Jiayun [1]Song;Supan [1]Wang;Haixiang [1]Chen

机构地区：[1]State Key Laboratory of Fire Science, University of Science and Technology of China

出　　处：《Theoretical & Applied Mechanics Letters》索引2014年第4卷第3期,共7页

基　　金：supported by the National Basic Research Program of China(2012CB719702);the International Science&Technology Cooperation Program of China(2014DFG72300);the Fundamental Research Funds for the Central University(WK2320000014) 摘　　要：Trajectories of flying hot particles were predicted in this work, and the temperatures during the movement were also calculated. Once the particle temperature decreased to the critical temperature for a hot particle to ignite building insulation materials, which was predicted by hot-spot ignition theory, the distance particle traveled was determined as the minimum safety distance for preventing the ignition of building insulation materials by hot particles. The results showed that for sphere aluminum particles with the same initial velocities and diameters,the horizontal and vertical distances traveled by particles with higher initial temperatures were higher. Smaller particles traveled farther when other conditions were the same. The critical temperature for an aluminum particle to ignite rigid polyurethane foam increased rapidly with the decrease of particle diameter. The horizontal and vertical safety distances were closely related to the initial temperature, diameter and initial velocity of particles. These results could help update the safety provision of firework display. 关键词：建筑保温材料安全距离热粒子点火硬质聚氨酯泡沫塑料临界温度初始速度垂直距离

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Safety distance for preventing hot particle ignition of building insulation materials

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