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Flame-spread probability and local interactive effects in randomly arranged fuel-droplet arrays in microgravity

机译:微重力下随机排列的燃料液滴阵列中的火焰传播概率和局部相互作用

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摘要

We investigated the flame-spread characteristics of randomly arranged fuel-droplet arrays in microgravity. Flame-spread probability was calculated based on a percolation model with the flame-spread-limit distance of evenly-spaced n-decane droplet arrays in microgravity. Flame-spread probability depends on the occupation fraction of droplets in a lattice and rapidly increases with the occupation fraction. The local flame-spread-limit distance of unevenly-spaced n-decane droplet arrays was experimentally investigated in microgravity. The droplets were arranged in a straight line at uneven intervals. The local flame-spread-limit distance of the unevenly-spaced droplet arrays depended on the droplet arrangement and increased from the flame-spread-limit distance of the evenly-spaced droplet arrays due to interactive effects. The flame-spread probability considering the increase in local flame-spread-limit distance is larger than that without it.
机译:我们研究了微重力下随机排列的燃料液滴阵列的火焰蔓延特性。基于渗流模型,以微重力均匀分布的正癸烷液滴阵列的火焰扩散极限距离为基础计算火焰扩散概率。火焰扩散概率取决于晶格中液滴的占有率,并随着占有率迅速增加。在微重力下实验研究了不均匀排列的正癸烷液滴阵列的局部火焰扩展极限距离。液滴以不均匀的间隔排列成直线。不均匀间隔的液滴阵列的局部火焰扩展极限距离取决于液滴的布置,并且由于相互作用的影响而从均匀间隔的液滴阵列的火焰扩展极限距离增加。考虑局部火焰蔓延极限距离增加的火焰蔓延概率大于没有火焰蔓延极限距离的火焰蔓延概率。

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