Abstract
The method to predict an amount of oil outflow from a bottom ruptured ship tank of double hull is presented basing on hydraulic balance of inside and outside of the tank. The amount of oil outflow predicted by the model is shown to be highly sensitive to difference between the oil level and the draft, the cross sectional area of the oil tank, the oil density, the structure of the double bottom and the non-dimensional water layer thickness. Non-dimensional water layer thickness α in the double hull have been measured for VLCC 1/50 scale model tank with double hull under the following conditions : double bottom heights=double side widths=0.02, 0.04 and 0.06m, oil tank cross sectional areas=0.26 and 0.52m^2, double bottom cross sectional areas=0.26 and 0.52m^2, double side cross sectional areas=0.009〜0.054m^2, initial oil levels=0.2〜0.5m, draft=0.2〜0.45m and simulated puncture size=71mmφ. The empirical correlations of a have been developed.
