Experimental investigation of fire propagation in single live shrubs
Experimental investigation of fire propagation in single live shrubs
复制标题
单株活灌木火灾蔓延的实验研究
DOI：
10.1071/wf16042
复制
发表时间：
2017
影响因子：
3.1
通讯作者：
D. Weise
中科院分区：
文献类型：
--
作者：
Jing Li;S. Mahalingam;D. Weise
这项工作广泛地关注于单独的、活的灌木，更具体地说，它检查了灌木林的体积密度及其与风和点火位置对最终火灾行为的综合影响。针对美国南加州两种典型灌木燃料物种，即chamise （Adenostoma fasciculatum Hook & Arn.）和manzanita (Arctostaphylos spp. Adans.)，建立了预测4年生乔木体积密度随高度变化的经验函数。在一个敞开式风洞中燃烧由紫菀叶和小直径树枝组成的燃料床。三个级别的体积密度，两个点火地点和两种风速进行了检查，重点是整体火灾行为。测量了平均最大质量损失率、最大质量损失率发生的时间、火焰高度、火焰角度、峰值气体温度及其峰值变化率。平均最大质量损失率不受风速、点火位置、容重和含水率的显著影响。风速和点火位置对最大质量损失率发生的时间有显著影响。只有风速影响火焰高度和火焰角度。灌木林燃烧区气体峰值温度主要受堆积密度的影响。
This work focuses broadly on individual, live shrubs and, more specifically, it examines bulk density in chaparral and its combined effects with wind and ignition location on the resulting fire behaviour. Empirical functions to predict bulk density as a function of height for 4-year-old chaparral were developed for two typical species of shrub fuels in southern California, USA, namely chamise (Adenostoma fasciculatum Hook & Arn.) and manzanita (Arctostaphylos spp. Adans.). Fuel beds of chamise foliage and small-diameter branches were burned in an open-topped wind tunnel. Three levels of bulk density, two ignition locations and two wind speeds were examined, focusing on overall fire behaviour. Mean maximum mass loss rate, elapsed time at which maximum mass loss rate occurred, flame height, flame angle, peak gas temperature and its peak change rate were measured. The mean maximum mass loss rate was not significantly affected by wind speed, ignition location, bulk density or moisture content. Both wind speed and ignition location significantly affected the time that maximum mass loss rate occurred. Only wind speed affected flame height and flame angle. The peak gas temperature within the shrub burning area was found to be mostly affected by the bulk density.
影响因子：
3.1
作者：
Ambarish Dahale;Selina C. Ferguson;B. Shotorban;S. Mahalingam
通讯作者：
Ambarish Dahale;Selina C. Ferguson;B. Shotorban;S. Mahalingam