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 in-flow of foreign marine life through this. And occurrence of toxic algae, such as extinction and reduction of fish species has be-come the global marine environment issues. This study is initial research to overcome these problems. In this study, a Non-bal-last system that can substitute the existing ballast tank is sug-gested according to specified loading conditions. Non-ballast system consists of ballast channel with the shape of a giant pas-sage leading from the bow to the stern to the role of the draft secure and trimming tank compartment inside of ballast chan-nel 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 execut-ing the flow analysis. Target vessel has designed by research team based on shape of KVLCC2. Via the sectional arrange-ment of Non-ballast system inside of hull, trim adjustment can be performed equal to the existing ballast tank.