A nonlinear velocity based boundary element method for the analysis of marine propellers in unsteady flow

Belibasakis, KA; Politis, GK

dc.contributor.author	Belibasakis, KA	en
dc.contributor.author	Politis, GK	en
dc.date.accessioned	2014-03-01T01:47:04Z
dc.date.available	2014-03-01T01:47:04Z
dc.date.issued	1998	en
dc.identifier.issn	0020868X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25137
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0032123730&partnerID=40&md5=1b276d0ea695b1924b289f9b4becb40d	en
dc.subject	Fluctuating blade surface pressures	en
dc.subject	Marine propellers	en
dc.subject	Mathematical models	en
dc.subject	Surface vorticity method	en
dc.subject	Unsteady flow	en
dc.title	A nonlinear velocity based boundary element method for the analysis of marine propellers in unsteady flow	en
heal.type	journalArticle	en
heal.publicationDate	1998	en
heal.abstract	The mathematical formulation of the inviscid flow problem concerning the operation of marine propellers in unsteady flow conditions is presented and the treatment of the problem, under the assumption of weak interaction between the propeller and the sheared onset flow, in the framework of potential, lifting flow applications is investigated. A boundary integral equation (Fredholm type, second kind) technique, involving surface vorticity distributions as the boundary unknowns, is applied to model the steady and unsteady marine propeller performance problems. A pressure-type Kutta condition is satisfied along the trailing edge of the blades. The modeling includes hub and finite blade thickness effects. A comparison between the present method, other boundary element techniques and experimental results is given and discussed. Capable to treat the terms of the velocity field associated with spatial vorticity distributions, the present formulation, in conjunction with solvers of the vorticity transport equation, can be utilized to model the unsteady propeller analysis problem, in order to overcome the limitations of weak interaction assumption.	en
heal.journalName	International Shipbuilding Progress	en
dc.identifier.volume	45	en
dc.identifier.issue	442	en
dc.identifier.spage	93	en
dc.identifier.epage	133	en