Hydrodynamic analysis of flapping wing systems for augmenting ship propulsion in rough sea

Belibassakis, KA; Politis, GK

dc.contributor.author	Belibassakis, KA	en
dc.contributor.author	Politis, GK	en
dc.date.accessioned	2014-03-01T02:53:40Z
dc.date.available	2014-03-01T02:53:40Z
dc.date.issued	2012	en
dc.identifier.issn	10986189	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36472
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-84866067495&partnerID=40&md5=526b1b47570d6b7a25c1a2e2d3616759	en
dc.subject	Biomimetic ship propulsion	en
dc.subject	Energy saving devices	en
dc.subject	Flapping wings	en
dc.title	Hydrodynamic analysis of flapping wing systems for augmenting ship propulsion in rough sea	en
heal.type	conferenceItem	en
heal.publicationDate	2012	en
heal.abstract	In the present work the analysis of an oscillating wing, located beneath the ship's hull, in random motion, is examined as an unsteady thrust production mechanism, augmenting the overall propulsion system of the ship. The wing undergoes a combined vertical and angular oscillatory motion, while travelling at constant forward speed. The vertical motion is induced by the random motion of the ship in waves, essentially due to ship heave and pitch, while the wing pitching motion is selected as a proper function of wing vertical motion and it is imposed by an external mechanism. Numerical results are presented for the thrust produced by the biomimetic wing as well as the resulting reduction in ship motions over a range of motion parameters. Our calculations indicate that the biomimetic wing is the proper mechanism for transforming the hull kinetic energy to useful thrust, augmenting thus the ship propulsion in rough seas with simultaneous reduction in ship motions. The present method can serve as a useful tool for the assessment and the preliminary design and control of such thrustaugmenting devices, which enhance the overall performance of a ship in a wavy environment. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).	en
heal.journalName	Proceedings of the International Offshore and Polar Engineering Conference	en
dc.identifier.spage	929	en
dc.identifier.epage	936	en