Abstract A car accident involving the oil tank may result in continuously spreading spill fires in tunnels, which poses great threats to the entrapped cars. However, there is still no relevant work concerning this issue. This paper experimentally investigates the spill fires in a tunnel by means of a model-scale tunnel and a steel trench where the liquid fuel flows and burns. The findings show that in a quiescent environment, the burning area of the spill fires in the tunnel is notably smaller than that in open space, while the presence of wind influence the burning area significantly, largely depending on the wind speed. For all the tests, there is no obvious steady burning stage, instead a rebound in burning area is observed after a similar shrinking burning area as that in open space. Generally, the burning area initially increases and then decreases with the increasing wind speed. These findings provide a better understanding of spill fire behaviors in tunnels and can further offer guidance on the firefighting of such fires.

中文翻译：

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纵向通风隧道内连续溢漏火灾的现象学特征

摘要 一次涉及油罐的车祸，可能导致隧道内不断蔓延的溢油火灾，对被困车辆构成极大威胁。但是，目前还没有关于这个问题的相关工作。本文通过模型规模的隧道和液体燃料流动和燃烧的钢槽，对隧道内的溢油火灾进行了实验研究。研究结果表明，在静止环境下，隧道溢油火灾的燃烧面积明显小于开放空间，而风的存在对燃烧面积的影响显着，很大程度上取决于风速。所有试验均未出现明显的稳定燃烧阶段，而是在燃烧面积缩小后出现与空地相似的燃烧面积反弹。一般来说，燃烧面积随着风速的增加先增大后减小。这些发现可以更好地了解隧道中的泄漏火灾行为，并可以进一步为此类火灾的灭火提供指导。