PARAMETER DETERMINATION OF THE TIME OF OIL EMISSION IN A BURNING TANK

The current article demonstrates that the physical nature of oil emission during the fire in oil tanks depends on bottom water overheating in the tank or on the surface of internal floating roof. Here it is also explained that the oil homotermal layer warmed-up to the boiling point reaches the level of bottom water or the water added into the tank to extinguish the fire, and the time of this leveling depends on thermal losses through the tank side surfaceout to the environment. According to the findings of the study the emission time depends on the cooled area of the tank surface. If water-cooling is intensive, the formation rate of the homotermal layer drastically decreases in the wake of its increasing thickness. The ratios concluded to determine the time of oil emission in the burning tank showing that it is influenced by warming-up rate of liquid, its peripheral combustion rate, initial fuel level in the tank and the thickness of the homotermal layer. As a result, there were derived two formulas to describe the thickness dynamics of of the homotermal layer which may be used to predict the time of oil emission at prolonged heating.