Numerical optimization of triangular concave edge shaped ramp in film cooling

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dc.contributor.authorTepe, Ahmet Umit
dc.date.accessioned2025-03-23T19:27:42Z
dc.date.available2025-03-23T19:27:42Z
dc.date.issued2022
dc.departmentSinop Üniversitesi
dc.description.abstractIn this study, the effect of triangular concave ramp (UIBR) on film cooling efficiency (FSE) and flow characteristics in film cooling was numerically investigated. In order to protect the jet stream from the effect of the main stream, the UIBR is placed on the surface where the jet hole meets the surface and the main stream comes from. In order to determine the most suitable design parameters of the UIBR, three different inclination angles (ar) of 10 degrees, 25 degrees and 45 degrees, three different dimensionless ramp heights (h/d) as 0.15, 0.30 and 0.50 examined. However, calculations were performed at blowing ratios (M) of 0.30, 0.60, 0.85 and 1.25. In order to accurately determine the physical properties of the film cooling in accordance with the real operating conditions, air was used for the main flow and CO2 was used for the fluid injected to the surface in the calculations. Accordingly, the jet stream to main stream density ratio (YO) is 1.50. CO2 was injected into the surface through a circular jet hole with an angle of aj=35 degrees with the surface and a diameter of d=4 mm. Numerical studies were carried out using Ansys FLUENT developed for Computational Fluid Dynamics (CFD) and the Transition k-kl-omega turbulence model. The results are compared to a conventional flat surface without ramp. According to the numerical results, increasing the ramp height and decreasing the ramp angle significantly increased the FSE. As a result, the highest increase in area-averaged FSE compared to conventional film cooling was obtained as 305.44% in the ramp design with h/d=0.50 and ar=10 degrees.
dc.description.sponsorshipScientific and Technological Research Application and Research Center, Sinop University, Turkey
dc.description.sponsorshipThe authors acknowledge to Scientific and Technological Research Application and Research Center, Sinop University, Turkey, for the support given to this study
dc.identifier.doi10.17341/gazimmfd.831511
dc.identifier.endpage1275
dc.identifier.issn1300-1884
dc.identifier.issn1304-4915
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85128736776
dc.identifier.scopusqualityQ2
dc.identifier.startpage1263
dc.identifier.trdizinid508630
dc.identifier.urihttps://doi.org/10.17341/gazimmfd.831511
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/508630
dc.identifier.urihttps://hdl.handle.net/11486/4971
dc.identifier.volume37
dc.identifier.wosWOS:000834843300011
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakTR-Dizin
dc.institutionauthorTepe, Ahmet Umit
dc.language.isotr
dc.publisherGazi Univ, Fac Engineering Architecture
dc.relation.ispartofJournal of the Faculty of Engineering and Architecture of Gazi University
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250323
dc.subjectFilm cooling
dc.subjectFilm cooling effectiveness
dc.subjectHeat transfer
dc.subjectGas turbine blade computational fluid dynamics
dc.titleNumerical optimization of triangular concave edge shaped ramp in film cooling
dc.typeArticle

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