State Key Laboratory of Fire Science, University of Science and Technology of China, JinZhai Road 96, Hefei, Anhui 230026, China.
State Key Laboratory of Fire Science, University of Science and Technology of China, JinZhai Road 96, Hefei, Anhui 230026, China; Institute of Advanced Technology, University of Science and Technology of China, Hefei, Anhui 230088, China.
J Hazard Mater. 2019 May 5;369:116-124. doi: 10.1016/j.jhazmat.2019.01.111. Epub 2019 Feb 5.
The interaction of multiple pool fires might lead to higher burning rate and flame height than single pool fire, raising the possibility of fire ignition and flame spread and increasing the risks to people, buildings and environment. To quantify the burning rate and flame height of multiple pool fires from the view of physical mechanism, this paper presents an experimental study on two identical square pool fires. Heptane was used as fuel. The pool size and spacing were varied. Results showed that both the burning rate and flame height change non-monotonically with spacing. From the view of air entrainment, a correlation for the flame height of two pool fires is developed involving pool size, spacing and the flame height of zero spacing. The comparison with experimental results shows that the developed correlation is suitable for two heptane or propane fires. A theoretical study based on energy balance at one of the pool surfaces is performed to evaluate the burning rate of two fires, which is finally expressed as a function of pool size, spacing, burning rate and the flame height of single fire. The proposed model is validated using the experimental and literature data, which presents a reasonable reliability.
多池火的相互作用可能导致比单个池火更高的燃烧速率和火焰高度，从而增加火灾点火和火焰蔓延的可能性，并增加对人员、建筑物和环境的风险。为了从物理机制的角度量化多池火的燃烧速率和火焰高度，本文对两个相同的方形池火进行了实验研究。正庚烷用作燃料。改变了池的大小和间距。结果表明，燃烧速率和火焰高度都随间距的变化是非单调的。从空气夹带的角度出发，开发了一个涉及池大小、间距和零间距火焰高度的两个池火焰高度的相关性。与实验结果的比较表明，所开发的相关性适用于正庚烷或丙烷的两个火灾。基于一个池表面的能量平衡进行了理论研究，以评估两个火灾的燃烧速率，最终将其表示为池大小、间距、燃烧速率和单个火灾火焰高度的函数。使用实验和文献数据对提出的模型进行了验证，结果表明该模型具有合理的可靠性。
