聚氨酯泡沫材料阴燃的点燃过程

被引:13
作者
路长
彭磊
周建军
张林鹤
尤飞
王清安
机构
[1] 中国科学技术大学火灾科学国家重点实验室
关键词
阴燃; 点燃; 自维持传播; 聚氨酯泡沫;
D O I
暂无
中图分类号
TQ320.7 [产品及检验];
学科分类号
摘要
阴燃材料的点燃系指材料在受到外热源加热后,依靠其自身异相氧化反应所放出的热量实现阴燃自维持传播的前期过程,如果导致熄灭则称不能点燃.聚氨酯泡沫材料在受到加热时,热流密度和加热时间是实现点燃的两大因素.在自然对流条件下,热流密度在1.6-6.8 kW/m2之间能实现阴燃材料的点燃.通过积分模型分析,得出了实现点燃的临界表达式.该式表明在一定的外部条件下,点燃成功表现为需要一个确定厚度的初始高温反应区 (炭层).在不同热流值的实验中,实现点燃的临界炭层厚度大约为40 mm,实验结果与理论分析能够较好吻合.
引用
收藏
页码:487 / 492
页数:6
相关论文
共 6 条
  • [1] An analysis of smoldering fires in closed compartments and their hazard due to carbon monoxide. Quintiere J G,Birky M,Macdonald F,et al. Fire and Materials . 1982
  • [2] Downward smolder of polyurethane foam: Ignition signatures. Andereon M K,Sleight R T,Torero J L. Fire Safety Journal . 2000
  • [3] A Study of Opposed Flow Smoldering of Polyurethane Foam: Comparison Between Normal and Microgravity. Walther D C,Fernandez-Pello A C. . 1998
  • [4] Space shuttle based microgravity smoldering combustion experiments. Walther D C,Fernandez-Pello A C,Urban D L. Combustion and Flame . 1999
  • [5] Recent United States developments in tests and materials for the flammability of furnishings. Damant G H. Jour nal of the Textile Institute . 1994
  • [6] Smoldering ignition of polyurethane foam in natural convection. Kitano M,Nagano M. Bulletin of Japanese Association of Fire Science and Engineering . 1993