中南大学学报（自然科学版）2017，Vol.48Issue(6)：1420-1424,5.DOI:10.11817/j.issn.1672-7207.2017.06.002
宽度变化对聚苯乙烯保温材料水平火蔓延预热角度的影响
Effect of width on pyrolysis angle during flame spread over horizontal extruded polystyrene (XPS) surface
摘要
Abstract
During the horizontal flame spread over XPS slabs,the effects of sample width on the angle and the influence of the angle on flame spread behaviours were investigated.The results show that at the initial stage the flame spreads faster at the slab surface than the other parts and eventually forms the pyrolysis angle at steady stage.The magnitude of pyrolysis angle increases firstly and then decreases with the increase of the sample width.However,the horizontal flame spread rate decreases at first and then increases with the increase of sample width.Moreover,according to the energy conservation,reducing the pyrolysis angle will enhance the heat transfer into the sample and thus lead to higher flame spread rate,which justifies the opposite trends of pyrolysis angle and flame spread rate.关键词
聚苯乙烯/预热角度/火蔓延/热传导Key words
polystyrene/pyrolysis angle/flame spread/heat transfer分类
建筑与水利引用本文复制引用
柳爱静,李开源,姚勇征,朱凯,程旭东..宽度变化对聚苯乙烯保温材料水平火蔓延预热角度的影响[J].中南大学学报（自然科学版）,2017,48(6):1420-1424,5.基金项目
国家自然科学基金资助项目(51206156)(Project(51206156) supported by the National Natural Science Foundation of China) （51206156）
