Wind-Aided Firespread Across Arrays of Discrete Fuel Elements. II. Experiment
Wind-Aided Firespread Across Arrays of Discrete Fuel Elements. II. Experiment
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DOI：
10.1080/00102209108951731
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发表时间：
1990-10
影响因子：
1.9
通讯作者：
F. Fendell;G. F. Carrier;Michael F Wolff
中科院分区：
文献类型：
--
作者：
F. Fendell;G. F. Carrier;Michael F Wolff
摘要在一个专门设计的风洞中进行了风助火在一组极小直径（1.3-4.4-mm）离散燃料元件上传播的实验。火蔓延率ty是从沿流向分布的近床面热电偶的输出推断出来的。燃料由一系列相同的、规则排列的、木制的、牙签状的Tuel元件组成，这些元件直立地放置在陶瓷基底上钻出的浅孔中。采用这种定义明确的燃料床有利于重复。广泛的试验表明，在均匀环境风速U和燃料质量分布m（燃料，每单位床平面面积，与火前通道消耗）的宽范围内，νy = 1/2（U/m）。研究和报道的其他参数对火蔓延率的影响包括：木材种类;燃料元件长度;燃料元件直径;燃料床宽度，包括沿流向变化的宽度;基质和/或燃料的含水量增加; sm 2。
Abstract Laboratory-scale experiments on wind-aided firespread across an array of very-small-diameter (1.3-4.4-mm), discrete fuel elements were carried out in a specially designed wind tunnel. The rate of firespread, ty, is inferred from the output of streamwise-disiributed, near-bed-surface thermocouples. The fuel consists of an array of identical, regularly arranged, wooden, toothpick-like Tuel elements, positioned upright in shallow holes drilled in a ceramic substrate. Adoption of this well-defined fuel bed facilitates repetition. Extensive testing suggests that νy ∼ (U/m)1/2 over a wide range of the uniform ambient wind speed U and the fuel-mass distribution m (fuel, per unit planform area of the bed, consumed with firefront passage). The effects on the firespread rate of other parameters investigated and reported include the type of wood species; fuel-element length; fuel-element diameter; fuel-bed width, including streamwise-varyjng width; enhanced moisture content of the substratum and/or fuel; sm...