FLOW CONTROL OF A CIRCULAR CYLINDER BY PERMEABLE SPLITTER PLATE WITH DIFFERENT POROSITIES AND ANGLE VALUES

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dc.contributor.authorSahin, Serdar
dc.contributor.authorDurhasan, Tahir
dc.contributor.authorPinar, Engin
dc.contributor.authorAkilli, Huseyin
dc.date.accessioned2025-01-06T17:44:01Z
dc.date.available2025-01-06T17:44:01Z
dc.date.issued2024
dc.description.abstractFlow control of bluff bodies has been studied extensively to eliminate adverse effects of wake flow such as vibration and acoustic noise or resonance. The circular cylinder has been studied as the bluff body since it is basic geometry and has been used in engineering applications such as heat exchanger tubes, power transmission lines, chimney stacks, bridges, radio telescopes, power lines, offshore drilling rigs etc. In this study, a permeable splitter plate was located at various downstream locations to control the wake flow of the cylinder. All experiments were carried out in a large-scale closed-loop water channel in the Fluid Mechanics Laboratory at Cukurova University. PIV was used to measure the instantaneous velocity vector field in the wake region of the cylinder at Reynolds number Re=5000, which is based on the cylinder diameter, D. Four different splitter plate angle values (0 =0 degrees; 15 degrees; 30 degrees; 45 degrees), three different porosity values (epsilon=0.30; 0.50; 0.70) were investigated. The porosity (epsilon) of the separator plates is defined as the ratio of the total hole area to the plate surface area. All lengths are nondimensionalized by dividing by the cylinder diameter and shown with the * index. The splitter plate length kept to constant during the experiment as ls*=1. The distance between the leading edge of the splitter plate and the cylinder (lg*) is variable due to the rotation of the separator plate at certain angles in the flow direction. To overcome this, the distance between the splitter plate rotation axis and the cylinder was taken as a parameter and shown with the **. The gap between splitter plate midpoint and cylinder (lg**) kept to constant during the experiments as lg**=1.5. When the plates are rotated, the cross-section parallel to the flow decreases, which increases the interaction between the boundary layers. Since the permeable separator plates prevent the interaction of the boundary layers formed in the flow around the cylinder, the effect of the permeable separator plates increases in the downstream regions where the interaction of the boundary layers increases. Thus, the fluctuations are reduced, and a more stabilized trail flow occurs downstream of the cylinder. It was observed that the vortex formation was delayed with the increase of the separator plate angle. In this study, the effect of the separator plate angle and the effect of the plate permeability were clearly observed.
dc.identifier.doi10.47480/isibted.1494122
dc.identifier.endpage102
dc.identifier.issn1300-3615
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85205322445
dc.identifier.scopusqualityQ4
dc.identifier.startpage89
dc.identifier.trdizinid1240815
dc.identifier.urihttps://doi.org/10.47480/isibted.1494122
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/1240815
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2869
dc.identifier.volume44
dc.identifier.wosWOS:001346279300007
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.language.isotr
dc.publisherTurkish Soc Thermal Sciences Technology
dc.relation.ispartofIsi Bilimi Ve Teknigi Dergisi-Journal of Thermal Science and Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241211
dc.subjectPIV
dc.subjectFlow Control
dc.subjectCylinder
dc.subjectSeparator plate
dc.subjectPermeable plate
dc.titleFLOW CONTROL OF A CIRCULAR CYLINDER BY PERMEABLE SPLITTER PLATE WITH DIFFERENT POROSITIES AND ANGLE VALUES
dc.title.alternativeFARKLI GÖZENEKLİLİK VE AÇI DEĞERLERİNE SAHİP GEÇİRGEN AYIRICI PLAKA İLE DAİRESEL BİR SİLİNDİRİN AKIŞ KONTROLÜ
dc.typeArticle

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