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首页> 外文期刊>Fire Safety Journal >Effect of fuel soaked time and fuel ratio on the flame spread rate over a porous bed wetted with liquid fuel
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Effect of fuel soaked time and fuel ratio on the flame spread rate over a porous bed wetted with liquid fuel

机译：燃料浸泡时间和燃料比对液体燃料润湿的多孔床火焰蔓延速率的影响

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摘要

An experimental investigation was conducted to explore the rate of flame spread over an unconsolidated porous bed of sand wetted with 2-propanol under a range of operating conditions. Video cinematography was employed to determine the rate of flame spread and characterise the combustion behaviour of the system. The rate of flame spread strongly correlated with: (ⅰ) the ratio of fuel volume to the weight of the sand bed, referred to as FR, and (ⅱ) the flame initiation delay, referred to as FID. The rates of flame spread associated with no initiation delay cases were found to rise with increasing FR while for cases associated with any given flame initiation delay the rate of flame spread was found to decrease with increasing FR. In addition, the rate of change in flame spread was observed to be different for beds containing finer particles in comparison to those containing coarser ones.
机译：进行了实验研究，以探索在一定范围的操作条件下，火焰在散布有2-丙醇的未固结多孔砂床上扩散的速率。使用视频摄影技术来确定火焰扩散的速率并表征系统的燃烧行为。火焰蔓延速率与以下各项密切相关：（ⅰ）燃料体积与沙床重量的比率，称为FR，以及（ⅱ）火焰引发延迟，称为FID。发现与无引发延迟情况相关的火焰蔓延速率随FR的增加而增加，而与任何给定的火焰引发延迟相关的情况则火焰蔓延速率随FR的增加而降低。另外，与含较粗颗粒的床相比，观察到含较细颗粒的床的火焰传播变化率不同。

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