Study On Combustion Characteristics Of Aviation Kerosene Pool Fire With Windy Condition

Fuel is inflammable and explosive. Fuel spill often occur during the petroleum, chemical industry production and transport processes. When fuel spills, it often incurs serious fires and even disasters. Widely used in the field of military, chemical and transportation, aviation fuel Often cause significant economic losses and casualties, because of its hazards characteristics such as fast burning, ferocious fire and high radiant heat intensity. Among all kinds of fuel-spilled-fires, pool fire under windy conditions is the most common one. So it's important to carry out research on combustion characteristics of aviation kerosene pool fire under windy condition.Experiments were carried out on self-made experimental equipment, which was based on the ISO 9705 Standard Room. Combustion characteristics of square, rectangular and circular pool fires with different sizes were studied. Wind speed ranges from 0 m s-1 to 4.99 m s-1. The effect of wind on combustion characteristics, such as HRR peak, time of HRR peak, burning rates was analyzed. The results show that, under quiescent condition, burning rates of square pool fire increases with the increase of air flow speed. The difference between experimental burning rates and the estimated values decrease with the increase of pool side lengths. Besides the burning rates of aviation fuel increase with the increase of wind speed. The experimental m w′′indy ms′′t ill values have linear relationship with v D ,which is consistent with previous research findings.Place factorαwas defined to describe the impact of air flow on rectangular pool fires, which have the same area and different aspect ratios and ways of placement. The results shows that, with the increase of wind speed ,the time of HRR peak values first increase then decrease whenα≥1.77, and decrease whenα≤1. Whenαdecreases, the values of CO concentration peak and production rate have a tendency to increase. There is no obvious effect of wind on burning rates.For circular pool fires, the combustion characteristics, such as HRR peak, burning rate, extinction coefficient, was measured. The effect of wind speed on HRR peak, CO2 concentration peak and production rate, and the relation between extinction coefficient and HRR peak were analyzed. And such empirical formulas were given. Based on fire characteristics, combustion process can be divided into two stages: ascending stage and descent stage, so the relation between several parameters and HRR are studied during these two stages. The study on the pyrolysis kinetics and full-scale experiments of computer monitors promotes the knowledge on pyrolysis process and the influences of outer factors to fire characteristic. The study also benefits the evaluation of fire risk of computer monitors and the avoidance of casualty and property loss in fire.The present work adds experimental data in the field of aviation kerosene study, and can enhance people's comprehension on burning characteristics of aviation fuel pool fires. Besides the study in this thesis is useful for fire prevention and fighting.