Numerical study of additive bulb effects on the resistance and self-propulsion characteristics of a full ship form

Tzabiras, GD

dc.contributor.author	Tzabiras, GD	en
dc.date.accessioned	2014-03-01T01:46:05Z
dc.date.available	2014-03-01T01:46:05Z
dc.date.issued	1997	en
dc.identifier.issn	09377255	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24838
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0031143003&partnerID=40&md5=4d3a51b3561d2a8e04ba879ec2a6a21a	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Design	en
dc.subject.other	Finite volume method	en
dc.subject.other	Flow of fluids	en
dc.subject.other	Navier Stokes equations	en
dc.subject.other	Propulsion	en
dc.subject.other	Shipbuilding	en
dc.subject.other	Bulbous bow	en
dc.subject.other	Resistance	en
dc.subject.other	Tankers (ships)	en
dc.title	Numerical study of additive bulb effects on the resistance and self-propulsion characteristics of a full ship form	en
heal.type	journalArticle	en
heal.publicationDate	1997	en
heal.abstract	This work studies scale effects and the influence of characteristic geometrical parameters on the calculated resistance and self-propulsion parameters when an additive bulb replaces the non-bulbous bow of a slow-moving full ship. The finite-volume methods have been adopted in the calculations. These methods solve the complete Reynolds-averaged Navier-Stokes equations. The performed numerical experiments have shown that all the examined additive bulbs improved the resistance and propulsive characteristics of the initial conventional hull with the U-shaped bow. This behavior has been attributed to flow changes around the bow which are convected far downstream. The shortest bulb tested improved resistance, thrust, and power most. Calculated results showed exactly the same trends at model and full scale, which is significant for extrapolating model scale results. Power calculations are sensitive to effective wake fraction estimations. The relevant uncertainties should be considered for quantitative predictions.	en
heal.publisher	Schiffahrts-Verlag Hansa C. Schroedter & Co, Hamburg, Germany	en
heal.journalName	Ship Technology Research	en
dc.identifier.volume	44	en
dc.identifier.issue	2	en
dc.identifier.spage	98	en
dc.identifier.epage	108	en