Effect of floaters' geometry on the performance characteristics of tightly moored wave energy converters

Mavrakos, SA; Katsaounis, GM; Apostolidis, MS

dc.contributor.author	Mavrakos, SA	en
dc.contributor.author	Katsaounis, GM	en
dc.contributor.author	Apostolidis, MS	en
dc.date.accessioned	2014-03-01T02:51:59Z
dc.date.available	2014-03-01T02:51:59Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35792
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77953011603&partnerID=40&md5=3795d9e857f6e747c88dee89f67a9aba	en
dc.subject.other	Axisymmetric wave	en
dc.subject.other	Cylindrical bodies	en
dc.subject.other	Diffraction radiation	en
dc.subject.other	Dynamical model	en
dc.subject.other	First-order	en
dc.subject.other	Hydraulic system	en
dc.subject.other	Hydrodynamic behavior	en
dc.subject.other	Hydrodynamic characteristics	en
dc.subject.other	Hydrodynamic parameters	en
dc.subject.other	Performance characteristics	en
dc.subject.other	Power absorption	en
dc.subject.other	Sea state	en
dc.subject.other	Semi-analytical methods	en
dc.subject.other	Time domain	en
dc.subject.other	Wave energy converters	en
dc.subject.other	Wave force	en
dc.subject.other	Arctic engineering	en
dc.subject.other	Buoys	en
dc.subject.other	Fluid dynamics	en
dc.subject.other	Geometry	en
dc.subject.other	Hydraulic equipment	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Mathematical models	en
dc.subject.other	Ocean currents	en
dc.subject.other	Power takeoffs	en
dc.subject.other	Wave power	en
dc.subject.other	Wave energy conversion	en
dc.title	Effect of floaters' geometry on the performance characteristics of tightly moored wave energy converters	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	The paper deals with the investigation of the effect that floaters' hydrodynamics has on the performance characteristics of tightly moored vertical axisymmetric wave energy converters. Several geometries of WECs floaters have been examined by assuming mat they have constant displacement. Specifically, a cylindrical body with and without vertical and horizontal skirts at its bottom, a cone and a two - body, piston - like arrangement, which consists of an internal cone and an exterior torus, have been investigated and comparatively assessed. The WECs first-order hydrodynamic characteristics, i.e. their exciting wave forces and the correspondent hydrodynamic parameters, are evaluated using a linearized diffraction - radiation semi-analytical method. A dynamical model for evaluating of the floaters' performance in time domain is developed that properly accounts for the floaters hydrodynamic behavior, the modeling of the hydraulic system and of the power take - off mechanism. The effect of the floaters geometry on the efficiency of the converter is analyzed through the results for the power absorption, under the excitation of several sea states. Copyright © 2009 by ASME.	en
heal.journalName	Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE	en
dc.identifier.volume	4	en
dc.identifier.issue	PART B	en
dc.identifier.spage	1145	en
dc.identifier.epage	1152	en