受限面对不同尺寸XPS竖向燃烧的影响探究

发布时间：2018-05-07 15:11

本文选题：挤塑聚苯乙烯 + 竖向燃烧　；参考：《消防科学与技术》2017年10期

【摘要】：为了探究受限面对不同尺寸XPS竖向燃烧的影响,利用自制竖向燃烧试验平台,分别对临空与一面贴壁两种工况下五种宽度的XPS进行竖向燃烧试验。研究发现,宽度为5.0、7.5、10.0、12.5 cm时,贴壁的火焰高度、热解速率、总体质量损失率、热释放速率均大于临空,并且随着宽度的增大,差值越来越小。宽度为15.0 cm时,贴壁的相关参数小于临空,但相差不大。研究证明,受限面能够对小尺寸的竖向火蔓延起到促进作用。随着宽度增大,预热区传热方式变化,受限面的促进作用逐渐降低。
[Abstract]:In order to investigate the effect of different sizes of XPS on vertical combustion, the vertical combustion tests of five widths of XPS were carried out under two operating conditions, namely, near air and side wall, using a self-made vertical combustion test platform. It is found that the flame height, pyrolysis rate, total mass loss rate and thermal release rate of the adherent are higher than those of the air when the width is 5.0 ~ 7.5 ~ 10.0 ~ 12.5 cm, and the difference becomes smaller and smaller with the increase of the width. When the width is 15.0 cm, the relative parameters of the adherent wall are smaller than that of the sky, but the difference is not significant. It is proved that the confined surface can promote the vertical fire spread in small size. With the increase of width, the heat transfer mode of preheating zone changes and the promotive effect of confined surface decreases gradually.
【作者单位】：广州市消防支队;
【分类号】：TU551;TU998.1

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