主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (12): 1758-1761.

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燃料间距对PMMA竖向火蔓延行为的影响

张家银   

  1. (徐州市消防救援支队,江苏 徐州 221000)
  • 出版日期:2021-12-15 发布日期:2021-12-15
  • 作者简介:张家银(1980-),男,江苏徐州人,徐州市云龙区消防救援大队工程师,主要从事火灾扑救与灾害事故救援方面的研究,江苏省徐州市泉州区三环西路9号,221000。

The effect of fuel spacing on vertical spreading behavior of PMMA fire

ZHANG Jia-yin   

  1. (Xuzhou Fire and Rescue Division, Jiangsu Xuzhou 221000, China)
  • Online:2021-12-15 Published:2021-12-15

摘要: 以PMMA(聚甲基丙烯酸甲酯)板(8 cm×10 cm×1 cm)为实验材料,开展不同燃料间距(0~10 cm)的竖向火蔓延实验,分析火焰高度、燃烧速率、热解前锋位置及点燃滞后时间的变化规律。结果发现,随着燃料间距增加,固体表面的净火焰高度与燃烧速率均呈现先增大后减小的趋势。此外,火焰在相邻固体燃料表面的蔓延过程中出现“点燃滞后”现象,点燃滞后时间随着燃料间距的增加呈指数级增长。

关键词: 燃料间距, 竖向燃烧, 火焰高度, 燃烧速率, 点燃滞后时间

Abstract: PMMA(Polymethyl Methacrylate) panels (8 cm×10 cm×1 cm) are used as experimental materials to carry out vertical fire spread experiments with different fuel spacing (0~10 cm) to analyze changes in flame height, burning rate, pyrolysis front position and ignition delay time. It is found that with the increase of fuel spacing, the net flame height and burning rate of the solid surface both increase first and then decrease. In addition, the flame "ignition delay" occurs during the spreading process of the adjacent solid fuel surface, and its ignition delay time increases exponentially with the increase of the fuel spacing.

Key words: fuel spacing, vertical combustion, flame height, burning rate, ignition delay time