Influence of fuel moisture content on the burning of cistus shrubs exposed to a low-intensity fire

IF 3.4 3区工程技术 Q2 ENGINEERING, CIVIL

Fire Safety Journal Pub Date : 2024-04-22 DOI:10.1016/j.firesaf.2024.104168

C. Luciani, V. Tihay-Felicelli, B. Martinent, P.A. Santoni, F. Morandini, T. Barboni

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Abstract

The aim of this study was to investigate experimentally the influence of fuel moisture content on the fire behaviour of Cistus monspeliensis, when exposed to a fire front spreading across a fuel bed. Shrubs of Cistus monspeliensis with leaf moisture contents ranging between 10 and 100 % were placed under a Large Scale Heat Release Calorimeter and a bed of wood wool was used before and under the branches to mimic an ignition from an underneath burning herbaceous layer. Mass loss, heat release rate (HRR) and total heat release (THR) were measured. The peak of HRR, the THR and the effective heat of combustion decreased linearly with the leaf moisture content. Two thresholds, characteristics of the fire behaviour of Cistus monspeliensis, were obtained. The ignition threshold, equals to 85 %, is the maximum leaf moisture content at which the cistus will ignite. The spreading threshold, equals to 55 %, is the maximum leaf moisture content at which the flame front will spread through the branches.

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燃料含水量对遭受低强度火灾的肉苁蓉灌木燃烧的影响

本研究的目的是通过实验研究燃料含水量对肉苁蓉（Cistus monspeliensis）在火前蔓延到燃料层时的火灾行为的影响。将叶片含水量介于 10% 和 100% 之间的 Cistus monspeliensis 灌木置于大型热释放量热仪下，并在树枝前和树枝下铺设木丝，以模拟从下方燃烧的草本植物层点火。测量了质量损失、热释放率（HRR）和总热释放率（THR）。热释放率峰值、总热释放率和有效燃烧热随叶片含水量的增加而线性降低。得出了两个阈值，它们是 Cistus monspeliensis 火烧行为的特征。点火阈值等于 85%，是肉苁蓉能够点燃的最大叶片含水量。蔓延阈值等于 55%，是火焰前沿在树枝中蔓延的最大叶片含水量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fire Safety Journal 工程技术-材料科学：综合

CiteScore

5.70

自引率

9.70%

发文量

153

审稿时长

60 days

期刊介绍： Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.