Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/6603
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dc.contributor.authorApaçoğlu, Buryan-
dc.contributor.authorPaksoy, Akın-
dc.contributor.authorAradağ, Selin-
dc.date.accessioned2021-09-11T15:42:57Z-
dc.date.available2021-09-11T15:42:57Z-
dc.date.issued2012en_US
dc.identifier.issn1300-3615-
dc.identifier.urihttps://search.trdizin.gov.tr/yayin/detay/136623-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/6603-
dc.description.abstractThis study analyzes the flow over a two-dimensional (2D) circular cylinder at a turbulent Reynolds number of 20,000 and its control by air blowing from several slots located on the surface of the cylinder, computationally. CFD simulations are performed by using Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations and Spalart-Allmaras turbulence model. Uncontrolled flow simulation results are validated using the experimental results available in literature for drag coefficient, Strouhal number, time-averaged pressure coefficient distribution on the circumference of the cylinder and mean velocity values at the downstream. Air blowing from several slots located on the cylinder is used as an actuator for forcing the flow. Blowing from four slots located on the circumference of the cylinder with a velocity magnitude of 50% of the free stream velocity yields a drag reduction of 23% compared to the uncontrolled case. Additionally, near wake region is further examined by application of Proper Orthogonal Decomposition (POD) technique. A Fast Fourier Transform (FFT) based spatial filtering procedure is employed in order to separate the effects of small-scale turbulent structures in the wake region. The FFT-filtered snapshot-based POD analysis shows that approximately 99% of the total energy of the flow can be represented by considering only the most energetic first two modes where the effects of von Karman vortex street can be seen appropriately both for uncontrolled and controlled flow cases.en_US
dc.description.sponsorshipThe Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [108M549]en_US
dc.description.sponsorshipThis research was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) under grant 108M549. The computations were performed at TOBB University of Economics and Technology CFD Laboratory. The authors would like to thank Dr. Cosku Kasnakoglu for his help related to snapshot-based Proper Orthogonal Decomposition (POD).en_US
dc.language.isoenen_US
dc.publisherTurkish Soc Thermal Sciences Technologyen_US
dc.relation.ispartofIsi Bilimi Ve Teknigi Dergisi-Journal of Thermal Science And Technologyen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCircular cylinderen_US
dc.subjectVon Karman vortex streeten_US
dc.subjectFlow controlen_US
dc.subjectBlowingen_US
dc.subjectProper Orthogonal Decompositionen_US
dc.titleEffects of Air Blowing on Turbulent Flow Over a Circular Cylinderen_US
dc.typeArticleen_US
dc.departmentFaculties, Faculty of Engineering, Department of Mechanical Engineeringen_US
dc.departmentFakülteler, Mühendislik Fakültesi, Makine Mühendisliği Bölümütr_TR
dc.identifier.volume32en_US
dc.identifier.issue2en_US
dc.identifier.startpage107en_US
dc.identifier.endpage119en_US
dc.authorid0000-0002-2034-0008-
dc.identifier.wosWOS:000319365200012en_US
dc.identifier.scopus2-s2.0-84880246942en_US
dc.institutionauthorAradağ, Selin-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ2-
dc.identifier.trdizinid136623en_US
item.openairetypeArticle-
item.languageiso639-1en-
item.grantfulltextnone-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
TR Dizin İndeksli Yayınlar / TR Dizin Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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