Suppression of tip vortex cavitation noise of propellers using pressureporestm technology

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dc.authorid0000-0002-0499-8248en_US
dc.contributor.authorAktas, Batuhan
dc.contributor.authorYılmaz, Naz
dc.contributor.authorAtlar, Mehmet
dc.contributor.authorSasaki, Noriyuki
dc.contributor.authorFitzsimmons, Patrick
dc.contributor.authorTaylor, David
dc.date.accessioned2021-03-20T20:09:33Z
dc.date.available2021-03-20T20:09:33Z
dc.date.issued2020
dc.departmentBTÜ, Denizcilik Fakültesi, Gemi İnşaatı ve Gemi Makineleri Mühendisliği Bölümüen_US
dc.description.abstractThis study aims to demonstrate the merits of pressure-relieving holes at the tip region of propellers, which is introduced as "PressurePores(TM)" technology as a retrofit on marine propellers to mitigate tip vortex cavitation noise for a quieter propeller. Shipping noise originates from various sources on board a vessel, amongst which the propeller cavitation is considered to dominate the overall radiated noise spectrum above the inception threshold. Thus, by strategically introducing pressure-relieving holes to modify the presence of cavitation, a reduction in the overall cavitation volume can be achieved. This mitigation technique could consequently result in a reduction of the radiated noise levels while maintaining the design efficiency as much as possible or with the least compromise. The strategic implementation of the holes was mainly aimed to reduce the tip vortex cavitation as this is one of the major contributors to the underwater noise emissions of a ship. In this paper, the details and results of a complementary numerical and experimental investigation is presented to further develop this mitigation concept for underwater radiated noise (URN) and to validate its effectiveness at model scale using a research vessel propeller. An overall finding from this study indicated that a significant reduction in cavitation noise could be achieved (up to 17 dB) at design speed with a favourable strategic arrangement of the pressure pores. Such a reduction was particularly evident in the frequency regions of utmost importance for marine fauna while the propeller lost only 2% of its efficiency.en_US
dc.description.sponsorshipOSCAR Propulsion Ltd.en_US
dc.description.sponsorshipThis research was funded by OSCAR Propulsion Ltd.en_US
dc.identifier.doi10.3390/jmse8030158en_US
dc.identifier.issn2077-1312
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttp://doi.org/10.3390/jmse8030158
dc.identifier.urihttps://hdl.handle.net/20.500.12885/463
dc.identifier.volume8en_US
dc.identifier.wosWOS:000529415700013en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorYılmaz, Naz
dc.language.isoenen_US
dc.publisherMdpien_US
dc.relation.ispartofJournal Of Marine Science And Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPressurePores(TM)en_US
dc.subjectpressure relief holesen_US
dc.subjectunderwater radiated noise (URN)en_US
dc.subjectcavitation noise mitigationen_US
dc.subjectexperimental hydrodynamicsen_US
dc.subjectcomputational fluid dynamics (CFD)en_US
dc.titleSuppression of tip vortex cavitation noise of propellers using pressureporestm technologyen_US
dc.typeArticleen_US

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