Hydrodynamic Performance Analysis for the Twin-Skeg Container Ships

摘要

A numerical analysis of viscous flow around twin skeg container hull forms was conducted using a hydrody-namic analysis system, WAVIS developed at KRISO, according to the variations of three design parameters: vertical skeg angle, longitudinal skeg angle and distance between skegs. Eight twin skeg hull forms were derived by associating three design parameters with each other: four vertical skeg angles (0°,10°,15°,20°), three longitudinal skeg angles (0°,1°,1.5°) and three distances between skegs (16m, 20m, 24m). It is found that the increase of the skeg vertical angle improves the resistance performance of twin skeg ship when the distance between skegs decreases. In nominal wake fraction point of view the increases of the skeg vertical angle and the skeg distance work advantageously. For the longitudinal skeg angle its increase improves both of the resistance and propulsion performances of twin skeg ship. The KRISO experimental results show the same conclusions of the present numerical study.