Bhattacharyya, AnirbanAnirbanBhattacharyyaRamesh, KiranKiranRamesh2024-04-172024-04-172024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46468The hydrodynamic performance of a marine propeller in combination with a partial accelerating duct is investigated. The duct is placed over the upper half of the propeller such that its distance from the blade tip is minimum in the vertical position (0 deg), and gradually increases to a maximum value for the horizontal blade positions (90 deg). The elliptical geometry allows a gradual transition for the propeller blades from the 'ducted condition' in the upper half to the 'open condition' in the lower half over one propeller revolution. CFD investigations are performed at two scales to understand the influence of the duct on the open water characteristics. The effect of duct geometry is studied by varying the axis ratio. Model self-propulsion show 2-3% improvement in the propeller thrust/torque ratio at higher propeller loadings with the partial duct.enhttp://rightsstatements.org/vocab/InC/1.0/Marine PropellerPartial DuctOpen Water CharacteristicsPressure CoefficientEngineering and Applied OperationsConference Paper10.15480/882.933110.15480/882.933110.15480/882.9294Conference Paper