欢迎访问过程工程学报, 今天是

›› 2013, Vol. 13 ›› Issue (2): 345-350.

• 材料工程专栏 • 上一篇    下一篇

高原与平原环境下PS板宽度及放置角度对其燃烧火焰结构和火蔓延特性的影响

黄新杰 张浩 丁厚成 张英 孙金华   

  1. 安徽工业大学建筑工程学院 安徽工业大学建筑工程学院 安徽工业大学建筑工程学院 中国科学技术大学 火灾科学国家重点实验室 中国科学技术大学 火灾科学国家重点实验室
  • 收稿日期:2013-01-25 修回日期:2013-03-11 出版日期:2013-04-20 发布日期:2013-04-20
  • 通讯作者: 黄新杰

Effects of Width and Inclined Angel of PS Plate on Its Combustion Flame Structure and Spreading

HUANG Xin-jie ZHANG Hao ZHU Qing-ming ZHANG Ying SUN Jin-hua   

  1. School of Civil Engineering and Architecture, Anhui University of Technology School of Civil Engineering and Architecture, Anhui University of Technology School of Civil Engineering and Architecture, Anhui University of Technology School of Civil Engineering and Architecture, Anhui University of Technology School of Civil Engineering and Architecture, Anhui University of Technology
  • Received:2013-01-25 Revised:2013-03-11 Online:2013-04-20 Published:2013-04-20
  • Contact: HUANG Xin-jie

PDF

摘要： 在高原环境(低压低氧)的拉萨和平原环境(常压常氧)的合肥，研究了不同宽度(W=4, 8, 12, 16 cm)的保温材料在不同放置角度(0o, 15o, 30o, 90o)下的火焰结构及火蔓延特征. 结果表明，外界环境对火焰角度、池火长度、火蔓延速度(vf)均有影响，相同放置角度下相同宽度的模塑聚苯乙烯泡沫板(EPS)和挤塑聚苯乙烯泡沫板(XPS)试样在拉萨的火焰角度均大于合肥；燃烧剧烈的XPS对火焰角度的影响明显高于EPS，池火长度随材料宽度及放置角度不同呈现分段递增、逐渐增长、流淌滴落等特点；在拉萨试样更易出现二次点燃现象；无论在拉萨还是合肥，90o放置角度下，EPS和XPS试样vf均随材料宽度增加呈先增加后减小的特点，火蔓延过程中火焰辐射热通量受宽度影响，宽度较小时vf遵循vfμ1-e-kW，宽度较大时遵循vfμTh4.

关键词: 高原, 平原, 模塑聚苯乙烯泡沫板, 挤塑聚苯乙烯泡沫板, 火蔓延速度, 放置角度

Abstract: The flame structure and spread characteristics of insulation materials expandable polystyrene (EPS) and extruded polystyrene (XPS) with the widths (W) of 4, 8, 12 and 16 cm inclined at the angles of 0o, 15o, 30o and 90o in the typical environments of Lhasa (low pressure and oxygen content) and Hefei (normal pressure and oxygen content) were studied. The result shows that the environments affect the flame angle, pool fire length and flame spread speed (vf). For the same width of EPS and XPS inclined at the same angle, the flame angle in Lhasa is bigger than that in Hefei, and it is more influenced by XPS than EPS for the more intensive combustion. The pool fire shows the cyclical increasing and the continual increasing in the length, and has the flowing and dripping characteristics when the width and inclined angle are changed. In Lhasa, the surface flame is easier to extinguish and then the surface zone is ignited again. When EPS and XPS are inclined at the angle of 90o in Lhasa and Hefei, vf firstly decreases with the width of sample and then increases, for the radiative heat flux dominates the whole process. When the width is relatively small, vf follows vfμ1-e-kW, while when the width is large, it follows that vfμTh4.

Key words: plateau, plain, expandable polystyrene, extruded polystyrene, flame spread speed, inclined angle

中图分类号: