摘要
针对木屑是常见可燃物之一,为了解自然对流条件下垂直向上的阴燃过程及向明火转化机制,通过搭建阴燃实验平炉,对非连续的木屑料进行实验研究。本文利用热电偶测试材料内部温度变化,并通过定量计算探讨连续与非连续的木屑材料阴燃及向明火转化的机理。结果显示,当在中间处断开后的非连续木屑材料,相比连续材料阴燃传播速度下降,仅在中间处会形成明火,不能完全燃烧;当在材料的4、7 cm和8、10 cm断开后的,传播速度会降得更低,但可以保持稳定的传播;而当材料的间断处的位置继续增加,阴燃不会继续传播甚至会导致直接熄灭。分析和结果可以解释阴燃传播过程中阴燃熄灭以及向有焰火转化的实验现象。
In order to understand transformation mechanism from smoldering to flaming combustion machine at natural convection conditions,smoldering experimental compartment was built, the softwood was researched. Explored the mechanism of softwood smoldering and transition from smoldering to flaming combustion with quantitative calculation and tested the temperature changes used thermocouple. The results shows that,the softwood smoldering propagation speed decreases when it broken in the middle, only in the middle will form the flame combustion, cannot complete combustion compared with continuous softwood, Propagation speed will drop lower when it broken at 4cm, 7 cm and 8cm, 10cm of material, but can maintain stable transmission. Smoldering will not continue to spread and can even lead to extinguished directly when materials discontinuities location of continue to increased. Analysis shows that, The non-uniform material is hard to gas-phase oxidation reaction in smoldering and easy to extinguish. The analysis and results can explain the experimental phenomena of smoldering extinguish and transition from smoldering to flaming combustion.
出处
《科技通报》
北大核心
2015年第9期250-253,268,共5页
Bulletin of Science and Technology
基金
公安部公安理论及软科学研究计划资助项目(2014LLYJGASX063)
郑州轻工业学院博士科研基金资助项目(2013BSJJ029)
广东省消防科学技术重点实验室开放基金资助项目(2014A01)
关键词
阴燃
木屑材料
明火
smoldering
softwood
flaming combustion
作者简介
孟牒（1985-）,女,辽宁抚顺人,助教,硕士,主要从事火灾燃烧与安全方面研究,E-mail：mengdie509@sina.com.
姚浩伟,E-mail：yaohaowei@gmail.com.
