A study on the internal flow system for development of a ballast-free ship

초록

Worldwide annual 3-5billion tons of seawater through ballast tank of the ship has been used in ballast water. Destruction and ecological disturbance of the marine ecosystem due to the inflow of foreign marine life through this. And occurrence of toxic algae, such as extinction and reduction of fish species has become the global marine environment issues. This study is initial research to overcome these problems. In this study, a Non-ballast system that can substitute the existing ballast tank is suggested according to specified loading conditions. Non-ballast system consists of ballast channel with the shape of a giant passage leading from the bow to the stern to the role of the draft secure and trimming tank compartment inside of ballast channel to the role of trim adjustment. In addition, by using a CFD, the inner seawater circulation of the Non-ballast system and flow characteristics around the hull are considered by executing the flow analysis. Target vessel has designed by research team based on shape of KVLCC2. Via the sectional arrangement of Non-ballast system inside of hull, trim adjustment can be performed equal to the existing ballast tank.