Study of the Characteristics of Ship Propulsion Systems with the Addition of a Kort Nozzle using the CFD Method

Abstract

The component of a ship that affects its speed the most is its propulsion system, which includes a propeller. The propeller produces thrust by converting the blades' rotating force. A well-functioning propulsion system increases the propeller's effectiveness, which enhances the ship's performance. The addition of a kort nozzle to the propeller is one of the numerous methods currently available for enhancing its performance. These justifications serve as the foundation for this investigation. The purpose of this study was to compare the propeller's operating efficiency with and without a koert nozzle addition. The result of the research it was detected that there was an increase in thrust force after using the cort nozzle under the influence of calm water and wavy water by 15 ~ 30%. There is an increase in efficiency under the influence of still water. But under the influence of waves the value is not great. The resulting efficiency value is approximately 3 ~ 5% for the same RPM rotation efficiency.