Simulation of unsteady motion of a propeller in a fluid including free wake modeling

Politis, GK

dc.contributor.author	Politis, GK	en
dc.date.accessioned	2014-03-01T01:21:25Z
dc.date.available	2014-03-01T01:21:25Z
dc.date.issued	2004	en
dc.identifier.issn	0955-7997	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16228
dc.subject	Boundary element method	en
dc.subject	Free wake modeling	en
dc.subject	Unsteady lifting flow	en
dc.subject	Wake rollup	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Mathematics, Interdisciplinary Applications	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Problem solving	en
dc.subject.other	Steady flow	en
dc.subject.other	Unsteady flow	en
dc.subject.other	Vortex flow	en
dc.subject.other	Wakes	en
dc.subject.other	Free wake modeling	en
dc.subject.other	Unsteady lifting flow	en
dc.subject.other	Wake geometry	en
dc.subject.other	Wake rollup	en
dc.subject.other	Boundary element method	en
dc.title	Simulation of unsteady motion of a propeller in a fluid including free wake modeling	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.enganabound.2003.10.004	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.enganabound.2003.10.004	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The problem of flow around a marine propeller performing a general 3D unsteady motion in an infinitely extended fluid is formulated and solved using a boundary element method. Hydrodynamic modeling of the freely moving - unsteady - trailing vortex sheet emanating from each blade is achieved, using vortex filaments and a time stepping method. Thus vortex wake-blade interaction can be taken correctly into consideration. The method uses bilinear panels for the representation of blade and free wake geometry and constant panels for the representation of the unknown dipole intensity. The proposed method produces very stable rollup wake patterns for both steady and unsteady problems for a broad range of discretization parameters. Application of the method to a number of specific cases of steady and unsteady propeller motion has shown the very good numerical performance of the method and that good predictions for forces and pressure distributions can be obtained. © 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Engineering Analysis with Boundary Elements	en
dc.identifier.doi	10.1016/j.enganabound.2003.10.004	en
dc.identifier.isi	ISI:000221734400009	en
dc.identifier.volume	28	en
dc.identifier.issue	6	en
dc.identifier.spage	633	en
dc.identifier.epage	653	en