Unsteady rollup modeling for wake-adapted propellers using a time-stepping method

Politis, GK

dc.contributor.author	Politis, GK	en
dc.date.accessioned	2014-03-01T01:23:18Z
dc.date.available	2014-03-01T01:23:18Z
dc.date.issued	2005	en
dc.identifier.issn	0022-4502	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16889
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-27144445030&partnerID=40&md5=eb2e0053cd5cc163e9af672f07ea9223	en
dc.subject.classification	Engineering, Marine	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Algorithms	en
dc.subject.other	Computer simulation	en
dc.subject.other	Shrinkage	en
dc.subject.other	Wakes	en
dc.subject.other	Time-stepping algorithm	en
dc.subject.other	Time-stepping method	en
dc.subject.other	Unsteady rollup modeling	en
dc.subject.other	Ship propellers	en
dc.title	Unsteady rollup modeling for wake-adapted propellers using a time-stepping method	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	An efficient method for predicting the unsteady wake contraction and rollup of a wake-adapted marine propeller is presented. The method is based on a Morino formulation of the unsteady propeller problem for an observer in an inertia - motionless - coordinate system. Thus, such problems as a propeller in inclined flow or a propeller performing any general motion (for example, heaving) can be directly simulated by the proposed method, as a by-product. The heart of the method is a time-stepping algorithm by which the dynamic evolution of the free wake is calculated in the time domain, satisfying the Helmholtz vortex theorems. The method has been applied to a number of steady and unsteady flow cases, and results are presented, showing that stable rollup wake patterns for a wide range of control parameters can be produced accompanied by good predictions for propeller forces and pressure distributions.	en
heal.publisher	SOC NAVAL ARCH MARINE ENG	en
heal.journalName	Journal of Ship Research	en
dc.identifier.isi	ISI:000232183000005	en
dc.identifier.volume	49	en
dc.identifier.issue	3	en
dc.identifier.spage	216	en
dc.identifier.epage	231	en