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过程工程学报 ›› 2018, Vol. 18 ›› Issue (3): 454-460.DOI: 10.12034/j.issn.1009-606X.217298

• 流动与传递 • 上一篇    下一篇

不同放置角度的建筑装饰材料PMMA的火焰蔓延特性

黄新杰1,2*， 刘 伟1， 陈功建1， 王纯洁1， 唐 刚1， 张 浩1   

  1. 1. 安徽工业大学建筑工程学院，安徽 马鞍山 243002；2. 中国矿业大学安全工程学院，江苏 徐州 221116
  • 收稿日期:2017-08-15 修回日期:2017-11-16 出版日期:2018-06-22 发布日期:2018-06-06
  • 通讯作者: 黄新杰 hxj501@mail.ustc.edu.cn
  • 基金资助:
    国家重点基础研究发展计划（973）基金资助项目

Flame Spread Characteristics over Building Decoration Material of PMMA with Different Placed Angles

Xinjie HUANG1,2*, Wei LIU1, Gongjian CHEN1, Chunjie WANG1, Gang TANG1, Hao ZHANG1   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma?anshan, Anhui 243002, China; 2. School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
  • Received:2017-08-15 Revised:2017-11-16 Online:2018-06-22 Published:2018-06-06
  • Contact: HUANG Xin-jie hxj501@mail.ustc.edu.cn

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摘要： 为揭示建筑装饰材料聚甲基丙烯酸甲酯(有机玻璃，PMMA)在不同放置角度下的火焰蔓延特性，通过自主搭建的小尺寸火焰蔓延实验平台，研究了宽3 cm、厚2 mm的PMMA试样在不同放置角度下的火焰蔓延特性. 结果表明，放置角度对PMMA火焰蔓延过程中热解区域及预热区长度影响很大，由15°到30°及由?60°到?75°时(顺流火焰蔓延时放置角度为正，逆流火焰蔓延时放置角度为负)，平均火焰倾角增加幅度最大. 顺流火焰蔓延的火焰长度随放置角度增加先略减小后逐渐增加，逆流火焰蔓延的火焰长度随放置角度的绝对值增加而略减小. 放置角度由0°到15°时，顺流火焰蔓延的平均速度呈跃变增长，逆流火焰蔓延的平均速度随放置角度绝对值增加而略降低.

关键词: 有机玻璃, 放置角度, 顺流火蔓延, 逆流火蔓延, 火蔓延速度

Abstract: In order to reveal the effect of placed angle on flame spread characteristics over polymethyl methacrylate (PMMA), a small-scale flame spread setup was established and then a series of flame spread experiments on PMMA samples with width 3 cm, thick 2 mm and different placed angles were carried out. The results showed that the pyrolysis zone and preheating zone length were largely influenced by placed angle through infrared image analysis. The average flame angle increased greatly when the placed angle changed from 15° to 30° and from ?60° to ?75° (for upward flame spread, the placed angle is positive, and for downward flame spread, the placed angle is negative). Meanwhile, for upward flame spread, the flame length decreased slowly and then increased with placed angle, however, for downward flame spread, the flame length decreased slightly with the absolute value of the placed angle. As for the upward flame spread, when the placed angle changed from 0° to 15°, the average flame spread speed will increase greatly. And for the downward flame spread, the average flame spread speed decreased slightly with the absolute value of the placed angle.

Key words: Polymethyl methacrylate, incline angle, upward flame spread, downward flame spread, flame spread speed