大尺度正庚烷流淌火试验

Experiment of Large Scale n-heptane Spill Fire

针对液体燃油储运过程中泄漏引发的火灾爆炸事故,设计并搭建液体燃油流淌火燃烧试验平台,进行了正庚烷流淌火试验。分析了4种不同泄漏速率下正庚烷流淌火的火焰前沿位置、燃烧面积、蔓延速率、燃烧速率等特征参数的变化规律。研究结果表明:正庚烷流淌火的燃烧蔓延阶段性特征明显,其典型参数均随泄漏速率正相关变化。正庚烷流淌火的稳定线燃烧速率为4.56×10^(-5)m·s^(-1);而泄漏速率每增加1 L·min^(-1),相应的初始蔓延速率增加6 mm·s^(-1)。

According to the fire and explosion accident caused by liquid fuel leaking during the storage and transportation,an experimental platform for liquid fuel spill fire was designed and built to conduct n-heptane spill fire during four different leaking rates. The variations of the typical characteristic parameters,such as the flame front,burning area,spread rate,burning rate and so on were analyzed according to the experimental phenomena. The results show that there are apparently different stages during the coupling process of the burning and spreading. A positive correlation appears between the typical characteristic parameters and the leaking rate of n-heptane. The stable linear burning rate for n-heptane spill fire is 4. 56 × 10^(-5)m·s^(-1). The increment of the initial spread rate is 6 mm·s^(-1) when the increase of leaking rate is 1 L·min^(-1).