Hydrodynamic damping and added mass of modern screw propellers

• Published in: Volume 7B: Ocean Engineering
• Main Authors: Krüger, Stefan, Abels, Wilfried
• Format: Conference Object
• Language: English
• Published: The American Society of Mechanical Engineers 2017
• Subjects: 600: Technik; Grim; Arctic
• Online Access: http://hdl.handle.net/11420/4802

The operation of ships with "slow-steaming" poses new problems for the torsional vibration analysis of the drive train. It is well known that the propeller determines the essential part of the mass moment of inertia and the system damping. Both values are determined during the initial design phase by semiempirical methods with have originally been developed by Schwanecke and Grim between 1970 and 1980. Since then, propeller designs have changed significantly and it is unclear if modern propeller designs are still covered by these calculation methods. The paper suggests an extension of Grim's and Schwanecke's method for modern screw propellers in homogeneous and unsteady flow.