Study On Combustion Characteristic Of Aviation Kerosene Pool Fire And Fire Suppression With Water Mist In Long And Narrow Spaces

With the increasing development of the building of long and narrow space suchas tunnels, which bring convenience to daily life, fire risk also improves rapidly.Aviation fuel, with high combustion heat, is widely used in chemical industryproduction and transport processes and other areas. Meanwhile it is the risk source inthe fuel-spilled-fires. Predecessors have carried out some research on aviation fuel,but few studies on combustion characteristics of aviation fuel under longitudinalventilation in long and narrow space have been done. In addition, with high frequencyof tunnel fire disasters, higher requirements for suppressing and extinguishing firewill be necessary. Water mist technology is very popular for fire suppression in recentyears due to many advantages, such as clean, high fire extinguishing, low cost andlittle damage to protected objects etc. However, study on water mist used in long andnarrow space under longitudinal ventilation is relatively few. On the base ofinadequacy of research of formers, with experimental and numerical simulation,combustion characteristics of square aviation fuel pool fire and fire suppressioneffectiveness of water mist in long and narrow space under longitudinal ventilationwill be investigate in this paper. In order to conduct the experiments conveniently, asmall-scale experimental platform of long and narrow space was built. Andlongitudinal ventilation was selected as the typical form of ventilation.Experiments of square aviation fuel pool fire were carried out on the small-scaleexperimental platform above. Experimental apparatus, such as electronic balance,intelligent flue gas analyzer, and data acquisition system were used in the experiments.A thorough study on the effect of longitudinal ventilation, pool area and pool depth tothe combustion characteristics of aviation fuel was made by changing longitudinalventilation, pool area and pool depth respectively. A series of change regularities havebeen obtained by comparing different experimental results. The mechanism has beendiscussed from different parameters, such as temperature. In addition, we haveperformed numerical simulations using Fire Dynamics Simulation (FDS). Accordingto our analysis of the related data from experiments and numerical simulations, wefind that numerical and experimental results agree well.Based on study of the combustion characteristics of aviation fuel above, a seriesof experiments of extinguishing square aviation fuel pool fire by water mist in thelong and narrow space under ventilation. Some parameters such as longitudinal ventilation, pool area and working pressure of water mist were changed in tests toexamine the effect of these factors on the effectiveness of water mist fire suppression.With experiments on water mist pool fire suppression and analysis of experimentalresults, main mechanism of aviation fuel pool fire suppression by water misthas beensummed up.The present work adds experimental data in the field of aviation kerosene andwater mist study under ventilation in long and narrow space. And can enhancepeople's comprehension on combustion characteristics of aviation fuel pool fires. Inaddition the study in this paper is useful for fire prevention and fighting.