Abstract
The high propulsive effi ciency, the fast manoeuvrability and the low noise production of the propulsion of marine animals inspired the development of a new ship propeller. This text describes the design of a fl apping foil ship propeller and the experiments performed on it. The fl apping foil propeller mimics the tail fi n of fi sh that swim at high speed, like tunas or sharks, in at least two ways: the hydrodynamics and the resonant driving mechanism. The motion of the foil is a combination of a heaving and a pitching oscillation, with a phase difference. The wake behind the tail of a fi sh has a special structure called the reversed von Karman street. If the motion parameters are well chosen, the wake behind the fl apping foil has a similar structure, resulting in positive thrust force and high propulsive effi ciency. The driving mechanism uses fl exibility to exclude the need for one of the two actuators. The infl uence of the free surface and the oscillation frequency on the performance is investigated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: International Journal of Design & Nature and Ecodynamics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.