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Rotor-Sail SYSTEM
Rotor-Sail SYSTEM
Rotor-sail is also called a Flettner rotor as a promising Wind Assisted Ship Propulsion(WASP). Based on the Magnus Effect, it can produce additional thrust from the wind on the ship.
It is normally comprised of huge rotor cylinder with rotating about 150~200 RPM. Therefore, we should investigate dynamic response of the rotor-sail caused by rotating motion and unbalance force of the structure.
Our researches focuse on modeling of the rotor-sail, dynamic response, and optimal structural design of the rotor-sail to reduce vibrations and to eliminate structrual issue.
Rotor Modeling of Rotor-sail
Rotor Modeling of Rotor-sail
We have developed the rotor model for analyzing the rotor-sail system with considering orthotropic material such as FRP. There are several approaches to model the rotor-sail. First, 4-DOFs model can be developed by neglecting the bending motion of the rotor cylinder. With 4-DOFs simple model, we can investigate low natural frequencies affecting by support structures such as bearings. Second, transfer function model can predict more sophiscated set of natural frequencies with considering bending vibration. Lastly, we developed FEM rotor-sail model to verify harmonic response of the rotor-sail caused by imbalance load of the rotor.
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