Experimental investigation of free-surface effects on flow characteristics of a torpedo-like geometry having a cambered nose

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dc.authoridDurhasan, Tahir/0000-0001-5212-9170
dc.authoridSahin, Besir/0000-0003-0671-0890
dc.contributor.authorSarigiguzel, F.
dc.contributor.authorKilavuz, A.
dc.contributor.authorOzgoren, M.
dc.contributor.authorDurhasan, T.
dc.contributor.authorSahin, B.
dc.contributor.authorKavurmacioglu, L. A.
dc.contributor.authorAkilli, H.
dc.date.accessioned2025-01-06T17:38:03Z
dc.date.available2025-01-06T17:38:03Z
dc.date.issued2022
dc.description.abstractIn this study, the free-surface effect in the wake region of a torpedo-like geometry having a cambered nose was investigated experimentally via Particle Image Velocimetry (PIV) and dye flow visualization methods. The Reynolds number was taken as Re = 2 x 10(4) and 4 x 10(4) while keeping the angle of attack (alpha = 0 degrees). The torpedo-like geometry is submerged at various positions from the free-surface in the range of 0.50 <= h/D <= 3.50 in which (h) is the distance from the water free-surface to the central plane of the geometry, and D is the diameter of the midsection of the torpedo-like geometry. The effect of the free-surface of water on the flow properties is also measured and presented comparatively in terms of normalized contours of instantaneous vorticity, time-averaged streamwise velocity, vorticity contours, Reynolds stress correlation, turbulent kinetic energy, velocity fluctuations in streamwise and cross-streamwise, vortex shedding frequency, spectral density distribution as well as pointwise variation. It is observed that the flow structures become asymmetric when the body is located near the free-surface for the submersion ratio of h/D <= 1.0. With the largest submersion ratio of h/D = 3.50, the flow characteristics are almost identical and symmetrical on both sides of the geometry.
dc.description.sponsorshipSci-entific and Technological Research Council of Turkey (TUBITAK) [214M318]; Cukurova University Scientific Research Project Coordinators (BAP) [FYL-2019-11552]
dc.description.sponsorshipThe authors wish to acknowledge the financial supports of the Sci-entific and Technological Research Council of Turkey (TUBITAK) under Contract No. 214M318 and Cukurova University Scientific Research Project Coordinators (BAP) under Contract No. FYL-2019-11552. The authors thank the Mechanical Engineering Department of Cukurova University and Advanced Fluid Mechanics PIV laboratory of Osmaniye Korkut Ata University, Turkey for using the water channel and mea-surement systems.
dc.identifier.doi10.1016/j.oceaneng.2022.111174
dc.identifier.issn0029-8018
dc.identifier.issn1873-5258
dc.identifier.scopus2-s2.0-85128176631
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.oceaneng.2022.111174
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2448
dc.identifier.volume253
dc.identifier.wosWOS:000806780700001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofOcean Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectFree-surface
dc.subjectPIV
dc.subjectTorpedo-like geometry
dc.subjectTurbulent flow
dc.subjectVorticity
dc.titleExperimental investigation of free-surface effects on flow characteristics of a torpedo-like geometry having a cambered nose
dc.typeArticle

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