Unconventional Propeller Tip Design - Hydrodynamic Study

dc.contributor.advisor	Holm, Håvard
dc.contributor.author	Ommundsen, Andreas
dc.date.accessioned	2015-10-05T15:05:17Z
dc.date.available	2015-10-05T15:05:17Z
dc.date.created	2015-06-08
dc.date.issued	2015
dc.identifier	ntnudaim:13746
dc.identifier.uri	http://hdl.handle.net/11250/2350909
dc.description.abstract	Winglets have been successful in the aircraft industry, but have not yet seen widespread use on marine propellers. Three different propellers (one conventional and two equipped with winglets) have been modelled and analysed with the CFD software STAR-CCM+. The winglet propellers achieved up to 40 % greater thrust than the conventional propeller at the operational propulsion point, but the torque increased even more - meaning that the overall open water efficiency was reduced by as much as 8.7 percentage points. The cavitation performance was also worse. Much of the negative effects are assumed to be caused by an unfavourable winglet design. It is concluded that this type of propellers may have a potential for better efficiency if the winglets are carefully designed.
dc.language	eng
dc.publisher	NTNU
dc.subject	Marin teknikk, Marin hydrodynamikk
dc.title	Unconventional Propeller Tip Design - Hydrodynamic Study
dc.type	Master thesis
dc.source.pagenumber	116