中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (11): 64-70.doi: 10.16265/j.cnki.issn1003-3033.2019.11.011
笪良军, 谢启源** 副研究员, 罗圣峰
收稿日期:
2019-08-17
修回日期:
2019-10-13
出版日期:
2019-11-28
发布日期:
2020-10-30
通讯作者:
** 谢启源(1978—),男,福建上杭人,博士,副研究员,主要从事高聚物材料燃烧与检测新技术方面的研究。E-mail: xqy@ustc.edu.cn。
作者简介:
笪良军 (1993—),男,安徽桐城人,硕士研究生,研究方向为固体火蔓延。E-mail:daliangj@mail.ustc.edu.cn。
基金资助:
DA Liangjun, XIE Qiyuan, LUO Shengfeng
Received:
2019-08-17
Revised:
2019-10-13
Online:
2019-11-28
Published:
2020-10-30
摘要: 为探究热塑性板材被点火源引燃后向四周火蔓延的行为特征,针对不同倾角的方形挤塑聚苯乙烯(XPS)泡沫板材,开展中心引燃后火焰向不同方向蔓延燃烧的试验,分析火蔓延状态、火蔓延速度和内部温度场随倾斜角度的变化关系。结果表明:XPS材料在受热时产生的收缩行为导致上方预热区接收热量变化,使得倾斜角度大的板材向上火蔓延更困难;当发生向上火蔓延时,蔓延速度随倾角的增大而增大,且速度远大于横向和向下火蔓延速度;向下火蔓延速度随倾斜角度的增大呈先降低后增大的趋势,横向火蔓延受板材倾角影响较小;当材料受热时温升剧烈,则易形成材料向该点处火蔓延,反之,材料受热出现显著收缩而温升较慢,则易熄灭。
中图分类号:
笪良军, 谢启源, 罗圣峰. 倾斜XPS板材向外多向耦合蔓延燃烧特性研究[J]. 中国安全科学学报, 2019, 29(11): 64-70.
DA Liangjun, XIE Qiyuan, LUO Shengfeng. Study on characteristics of multi-direction coupling flame spread and combustion after central ignition of inclined XPS sheets[J]. China Safety Science Journal, 2019, 29(11): 64-70.
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