Wave field generated by finite-span hydrofoils operating beneath a free surface

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dc.authorid0000-0002-0406-0532en_US
dc.authorscopusid57152462800en_US
dc.authorwosid-en_US
dc.contributor.authorÖzdemir, Yavuz Hakan
dc.contributor.authorCoşgun, Taner
dc.contributor.authorBarlas, Barış
dc.date.accessioned2023-07-24T12:24:23Z
dc.date.available2023-07-24T12:24:23Z
dc.date.issued2021en_US
dc.departmentMeslek Yüksekokulları, Deniz Teknolojileri Meslek Yüksekokulu, Motorlu Araçlar ve Ulaştırma Teknolojileri Bölümü
dc.description.abstractThe present paper focuses on the numerical investigation of the flow around the fully submerged 2D and 3D hydrofoils operating close to a free surface. Iterative boundary element method is implemented to predict the flow field. This study aims to investigate the aspect ratio effect on the free surface interactions and hydrodynamic performance of the hydrofoils under a free surface by using potential flow theory. Three different submergence depths and aspect ratios are studied in the wide range of Froude Numbers. In 3D cases, spanwise width of the numerical wave tank model is selected both equal and wider to the foil span, to observe the sidewall effects. Wave field seems to be two dimensional at low Froude numbers. On the other hand, signs of three dimensionalities are observed on the free surface structure for higher Fn, even the predicted wave elevations are very close to 2D calculations in the midsection. Increment in the Fn give a rise to the amplitude of the generated waves first, however a further increase in Fn has a lowering effect with the beginning of waves spill in the spanwise direction in the form of Kelvin waves. Free surface proximity and resultant wave field are also seeming to be linked with the lift force on the hydrofoil. As aspect ratio of the foil increase, 3D lift values are getting closer to those of 2D calculations. However, it is seen that, 3D BEM predictions of a hydrofoil under free surface effect cannot be considered twodimensional even the aspect ratio is equal to 8.en_US
dc.identifier.citationÖzdemir, Y. H., Coşgun, T., & Barlas, B. (2021). Wave field generated by finite-span hydrofoils operating beneath a free surface. Brodogradnja, 72(1), 145-167. doi:10.21278/brod72108en_US
dc.identifier.doi10.21278/brod72108
dc.identifier.endpage167en_US
dc.identifier.issn0007-215X
dc.identifier.issn1845-5859
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85105513887
dc.identifier.startpage145en_US
dc.identifier.urihttps://doi.org/10.21278/brod72108
dc.identifier.urihttps://hdl.handle.net/20.500.12428/4434
dc.identifier.volume72en_US
dc.identifier.wosWOS:000653658200008
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorÖzdemir, Yavuz Hakan
dc.language.isoen
dc.publisherBrodarski Instituteen_US
dc.relation.ispartofBrodogradnjaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectAspect ratioen_US
dc.subjectComputational fluid dynamicsen_US
dc.subjectFree surfaceen_US
dc.subjectIterative boundary element methoden_US
dc.subjectPotential flowen_US
dc.subjectSubmerged hydrofoilen_US
dc.titleWave field generated by finite-span hydrofoils operating beneath a free surface
dc.typeArticle

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