중형선박의 추진효율 향상을 위한 부가물 개발에 관한 연구

Abstract

In this thesis, the development of propulsive efficiency improvement device for medium size vessels has been studied. Developed device "Crown Duct" is a Semi-Duct mixture to small size of the Stator to properly guide the direction of flow. Crown duct designs were performed, and structural calculation in the point of safety and practical application. A qualitative analysis by theoretical calculation with CFD code of Shipflow, and model test in towing tank has been carried out. The model tests showed 4.4% efficiency gain with Crown Duct at full load condition and 6.87% at ballast condition compared with the bare hull ones.