Numerical investigations of aerodynamic performance for flettner rotors in the presence of full-scale ship-rotor interaction

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dc.authorid0000-0002-0499-8248
dc.authorid0000-0001-7194-2976
dc.contributor.authorYilmaz, Naz
dc.contributor.authorBordogna, Giovanni
dc.contributor.authorAktas, Batuhan
dc.date.accessioned2026-02-08T15:15:28Z
dc.date.available2026-02-08T15:15:28Z
dc.date.issued2026
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThis study presents numerical investigations of aerodynamic characteristics (lift and drag coefficients) for Flettner rotors in the presence of the interaction between the rotor and the full-scale merchant ship. For this purpose, several numerical investigations have been conducted for two different isolated rotors in model and fullscale conditions using Reynolds Averaged Navier-Stokes (RANS) based Computational Fluid Dynamics (CFD) approaches. The effects of different turbulence models, mesh types and sizes, and boundary conditions on the domain's bottom surface have been investigated for a reference rotor in isolation and model-scale conditions. After that, selected methods were implemented on a full-scale isolated rotor geometry. The results of the computations were compared with experimental and computational results from the open literature and showed good agreement. As a result of the validation studies in isolated conditions, a similar CFD approach was applied on a full-scale rotor, which is operating on a capsize bulk carrier (merchant ship) to investigate the interaction between the rotor and the ship. During these numerical calculations, different ship and wind speeds, rotation rates for rotor and Thom, and also different wind profiles such as Straight and Atmospheric Boundary Layer (ABL) were investigated for the Flettner rotors in interaction with the full-scale ship. In conclusion, not only the aerodynamic characteristics of the Flettner rotor but also the effects of this complex interaction between the rotor and ship were analysed and investigated computationally. Results show that rotor-ship interaction significantly affects aerodynamic performance at spin ratios above 3, with drag forces increasing and lift forces decreasing compared to isolated conditions. Moreover, ABL profiles consistently led to lower lift coefficients than uniform wind conditions, underlining the importance of realistic environmental modeling.
dc.identifier.doi10.1016/j.renene.2025.124350
dc.identifier.issn0960-1481
dc.identifier.issn1879-0682
dc.identifier.scopus2-s2.0-105016452964
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.renene.2025.124350
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5779
dc.identifier.volume256
dc.identifier.wosWOS:001573305600001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofRenewable Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzWOS_KA_20260207
dc.subjectFlettner rotor
dc.subjectWind assisted propulsion (WASP)
dc.subjectIsolated rotor
dc.subjectRotor-ship interaction
dc.subjectComputational fluid dynamics (CFD)
dc.titleNumerical investigations of aerodynamic performance for flettner rotors in the presence of full-scale ship-rotor interaction
dc.typeArticle

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