An experimental investigation on the flow control of the partially stepped NACA0012 airfoil at low Reynolds numbers

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dc.authoridSEYHAN, Mehmet/0000-0002-5927-9128
dc.contributor.authorSeyhan, Mehmet
dc.contributor.authorAkbiyik, Hurrem
dc.date.accessioned2025-01-06T17:44:27Z
dc.date.available2025-01-06T17:44:27Z
dc.date.issued2024
dc.description.abstractAn experimental study of flow control around a NACA0012 airfoil modified with fully and partially step geometry was conducted at Reynolds numbers of 6 x 104 and 1.2 x 105. Partially step geometries, the location of the step on the airfoil, and Reynolds number are varied to show their effect on aerodynamic performance and flow structures on the airfoil. Experimental results show that fully and partially step geometries are effective for flow control around the airfoil and aerodynamic performance enhancement. The maximum increase in lift coefficient is approximately 46%, and the stall angle is shifted about 1 degrees by the SM4 model at Re of 6x104 while the step geometry is on the pressure side. For a Reynolds number of 1.2 x 105, the highest increase in the lift-to-drag ratio of the airfoil is observed about 17.1 at an angle of attack of 6 degrees by the SM2 model when step geometry is placed on the pressure side of the airfoil. In the event of partially or fully stepped at the pressure side of the model, step flow structures, including the reattachment line, recirculation zone, and corner eddy, are obtained. However, even though the step geometry is at the suction surface of the model, the formation of a laminar to turbulent transition is observed. The overall results suggest that the partially stepped geometry length, Reynolds number, and step location side on the airfoil have an important role in flow control to improve aerodynamic performance for various angles of attack.
dc.identifier.doi10.1016/j.oceaneng.2024.118068
dc.identifier.issn0029-8018
dc.identifier.issn1873-5258
dc.identifier.scopus2-s2.0-85192529719
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.oceaneng.2024.118068
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3066
dc.identifier.volume306
dc.identifier.wosWOS:001241410900001
dc.identifier.wosqualityN/A
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.subjectStepped airfoil
dc.subjectFlow control
dc.subjectOil flow visualization
dc.subjectLift coefficient
dc.subjectStep flow structure
dc.titleAn experimental investigation on the flow control of the partially stepped NACA0012 airfoil at low Reynolds numbers
dc.typeArticle

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