Influence of free-surface on wake flow characteristics of a torpedo-like geometry

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dc.contributor.authorKilavuz, A.
dc.contributor.authorDurhasan, T.
dc.contributor.authorOzgoren, M.
dc.contributor.authorSarigiguzel, F.
dc.contributor.authorSahin, B.
dc.contributor.authorKavurmacioglu, L. A.
dc.contributor.authorAkilli, H.
dc.date.accessioned2024-02-23T13:55:53Z
dc.date.available2024-02-23T13:55:53Z
dc.date.issued2022
dc.departmentNEÜen_US
dc.description.abstractIn the present work, the flow topologies of a generalized torpedo-like geometry were investigated experimentally via Particle Image Velocimetry (PIV) and dye visualization. The study was conducted at length based on the Reynolds number of Re = 20 x 10(3) and 40 x 10(3). The torpedo-like geometry was positioned at ratios of immersion between 0.50 <= h/D <= 3.50 to investigate the free-surface effect on the present results, comparatively. PIV measurements provided ensemble-averaged velocity fluctuations, turbulent kinetic energy and Reynolds stress correlation with spectral analysis of the vortex-shedding mechanism. It is observed that different vortex shedding mechanism occurs depending on the immersion ratio. At h/D = 0.5, wake flow is characterized by the lower shear layer while upper shear layer dominates it at h/D = 0.75 and 1.00. The influence of the free-surface on flow characteristics is found to be negligible at h/D > 2.00 for both Reynolds numbers. Alternating vortex shedding occurs and the wake regions at h/D = 3.5 became nearly symmetrical. The size of the wake zone is moved closer to the stern of the torpedo-like geometry at Re = 40 x 10(3) and causes a smaller recirculating region. Spectral analysis of the streamwise velocity revealed a decreasing trend of Strouhal number with increasing immersion ratios. The changing of the Strouhal number showed a significant increase at h/D = 0.75 for Re = 20 x 10(3) an ever-decreasing trend for Re = 40 x 10(3).en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [214M318]; Cukurova University Scientific Research Project Coordinators (BAP) [FYL-2019-11596]en_US
dc.description.sponsorshipThe authors would like to acknowledge the Scientific and Technological Research Council of Turkey (TUBITAK) underContract No. 214M318 and Cukurova University Scientific Research Project Coordinators (BAP) under Contract No. FYL-2019-11596. It is a pleasure to thank the Mechanical Engineering Department of Cukurova University and the Advanced Fluid Mechanics PIV laboratory of Osmaniye Korkut Ata University, Turkey for letting the authors conduct this experimental work.en_US
dc.identifier.doi10.1007/s00773-022-00893-7
dc.identifier.endpage1147en_US
dc.identifier.issn0948-4280
dc.identifier.issn1437-8213
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85133889048en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1130en_US
dc.identifier.urihttps://doi.org/10.1007/s00773-022-00893-7
dc.identifier.urihttps://hdl.handle.net/20.500.12452/10999
dc.identifier.volume27en_US
dc.identifier.wosWOS:000825067800001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Japan Kken_US
dc.relation.ispartofJournal Of Marine Science And Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAuven_US
dc.subjectFree-Surfaceen_US
dc.subjectPiven_US
dc.subjectTorpedo-Like Geometryen_US
dc.subjectTurbulent Flowen_US
dc.titleInfluence of free-surface on wake flow characteristics of a torpedo-like geometryen_US
dc.typeArticleen_US

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