有坡度下点源持续泄漏溢油流淌火扩散特性实验研究

Experimental study of the spread of point source continuous oil spill fires along various slopes

有坡度下持续泄漏溢油流淌火的特性研究可以为溢油流淌火灾事故的预防和救援提供重要理论支撑。该文通过点源持续泄漏溢油流淌火实验,观测了不同坡度下持续溢油流淌火的扩散和燃烧过程,并测量了扩散速率。根据实验中是否观察到稳定过程与收缩过程,将溢油流淌火的扩散过程随坡度的变化划分为3个阶段。通过分析扩散过程中重力、摩擦阻力与表面张力随角度的关系,对于玻璃表面上的正庚烷流淌火,3个阶段可以划分为坡度为0°~3°时表面张力主导的扩散过程、坡度为4°~5°时摩擦阻力主导的扩散过程以及坡度大于5°时重力主导的扩散过程。

The characteristics of fires in continuous oil spills along various slopes were investigated experimentally to improve theoretical models for the prevention and control of oil spill fires. The spreading and burning rates of continuous oil spill fires along various slopes were observed for point source oil spills. The spill fire spreading was divided into three stages for various slopes based on whether the fire became stable or was shrinking. For the n-heptane spill fire on the glass surface, the relationship between gravity, friction and surface tension forces during the spreading characterizes the three stages as the “surface tension dominant” stage for slopes of 0°-3°, the “friction dominant”stage for slopes of 4°-5° and the “gravity dominant” stage for slopes greater than 5°.