Investigation of the aerodynamic effects of bio-inspired modifications on airfoil at low Reynolds number

dc.contributor.authorDemir, Hacı Murat
dc.contributor.authorKaya, B.
dc.date.accessioned2024-05-02T07:33:18Z
dc.date.available2024-05-02T07:33:18Z
dc.date.issued2023
dc.departmentMühendislik Fakültesi
dc.description.abstractA numerical study was performed to investigate flow behaviors around bioinspired modified airfoils compared with NACA 4412 airfoil at Re=5.8x104 by solving the twodimensional, RANS equations with k-omega STT turbulence model. The obtained results reveal a rather abrupt decrease of lift at stall for the NACA 4412 airfoil in contrast to the mild stall depicted by the top-modified airfoil. As compared to the experimental results of the profiled airfoil in the literature, the characteristic behavior of the variation in the lift coefficient shows resemblance. It is seen that from the velocity distribution results, fluid flowed smoothly along the streamlined nose of NACA 4412 airfoil until alpha=4 degrees and streamlines adhered well for both airfoils at low angles (0 degrees, 2 degrees). Smaller circulation bubbles were noticed to settle in the canyons of the corrugated cross-section of the top-modified airfoil. In the wake region of the modified airfoil, there is no obvious large flow separation or circulation region at low angles of attack. However, the blue regions of the dimensionless velocity over the NACA 4412 airfoil and bottom-modified airfoil were narrower than over the top-modified airfoil. The recirculation zone over the airfoil started to enlarge, and the rolling up of the trailing-edge vortex appeared. After alpha=12 degrees, the adverse pressure gradient on the suction side of the airfoils became more intense. In the wake zones, it was seen that the circulation regions grew remarkably and became largest as the angle of attack rose to alpha=16 degrees, which pointed out increased drag forces of airfoils.
dc.identifier.doi10.15282/jmes.17.4.2023.5.0769
dc.identifier.endpage9724en_US
dc.identifier.issn2289-4659
dc.identifier.issn2231-8380
dc.identifier.issue4en_US
dc.identifier.startpage9715en_US
dc.identifier.urihttps:/dx.doi.org10.15282/jmes.17.4.2023.5.0769
dc.identifier.urihttps://hdl.handle.net/20.500.12451/11747
dc.identifier.volume17en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherUniversiti Malaysia Pahang
dc.relation.ispartofJournal of Mechanical Engineering and Sciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectAirfoil
dc.subjectAerodynamics
dc.subjectBio-inspired Airfoil
dc.subjectCFD
dc.subjectCorrugated
dc.subjectDragonfly
dc.subjectLow-Reynolds Number
dc.titleInvestigation of the aerodynamic effects of bio-inspired modifications on airfoil at low Reynolds number
dc.typeArticle

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