非连续木屑材料垂直向上阴燃过程实验研究

发布时间：2018-03-23 20:19

本文选题：阴燃　切入点：木屑材料　出处：《科技通报》2015年09期

【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。
[Abstract]:Wood chips are one of the common combustible substances. In order to understand the vertical upward smoldering process and the mechanism of transformation to open fire under natural convection conditions, the open hearth of smoldering experiment was built. In this paper, the temperature change of the material is measured by thermocouple, and the mechanism of continuous and discontinuous wood chip materials smoldering and transforming to open fire is discussed by quantitative calculation. When the discontinuous wood chip material is disconnected in the middle, the propagation velocity of the discontinuous wood chip material decreases compared with that of the continuous material, but only in the middle it will form an open fire and cannot be completely burned, and when the material is disconnected at 4 ~ 7 cm and 8 ~ 10 cm, the propagation velocity will decrease even lower. But it can keep steady propagation; and as the gap in the material continues to increase, The analysis and results can explain the experimental phenomenon of smoldering extinguishment and its transformation to fireworks during the process of smoldering propagation.
【作者单位】：郑州轻工业学院计算机与通信工程学院;郑州轻工业学院建筑环境工程学院;河南理工大学安全科学与工程学院;
【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)
【分类号】：X932

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