Experimental investigation of free-surface effects on flow characteristics of a torpedo-like geometry having a cambered nose
dc.authorid | Durhasan, Tahir/0000-0001-5212-9170 | |
dc.authorid | Sahin, Besir/0000-0003-0671-0890 | |
dc.contributor.author | Sarigiguzel, F. | |
dc.contributor.author | Kilavuz, A. | |
dc.contributor.author | Ozgoren, M. | |
dc.contributor.author | Durhasan, T. | |
dc.contributor.author | Sahin, B. | |
dc.contributor.author | Kavurmacioglu, L. A. | |
dc.contributor.author | Akilli, H. | |
dc.date.accessioned | 2025-01-06T17:38:03Z | |
dc.date.available | 2025-01-06T17:38:03Z | |
dc.date.issued | 2022 | |
dc.description.abstract | In 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.sponsorship | Sci-entific and Technological Research Council of Turkey (TUBITAK) [214M318]; Cukurova University Scientific Research Project Coordinators (BAP) [FYL-2019-11552] | |
dc.description.sponsorship | The 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.doi | 10.1016/j.oceaneng.2022.111174 | |
dc.identifier.issn | 0029-8018 | |
dc.identifier.issn | 1873-5258 | |
dc.identifier.scopus | 2-s2.0-85128176631 | |
dc.identifier.scopusquality | Q1 | |
dc.identifier.uri | https://doi.org/10.1016/j.oceaneng.2022.111174 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14669/2448 | |
dc.identifier.volume | 253 | |
dc.identifier.wos | WOS:000806780700001 | |
dc.identifier.wosquality | Q1 | |
dc.indekslendigikaynak | Web of Science | |
dc.indekslendigikaynak | Scopus | |
dc.language.iso | en | |
dc.publisher | Pergamon-Elsevier Science Ltd | |
dc.relation.ispartof | Ocean Engineering | |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | |
dc.rights | info:eu-repo/semantics/closedAccess | |
dc.snmz | KA_20241211 | |
dc.subject | Free-surface | |
dc.subject | PIV | |
dc.subject | Torpedo-like geometry | |
dc.subject | Turbulent flow | |
dc.subject | Vorticity | |
dc.title | Experimental investigation of free-surface effects on flow characteristics of a torpedo-like geometry having a cambered nose | |
dc.type | Article |