2026-02-122026-02-122025-12-18ANDRADE, Silvia Cristina de Pádua. O efeito sweep não otimização de pás de turbinas hidrocinéticas de eixo horizontal com difusor. Orientador: Jerson Rogério Pinheiro Vaz. 2025. 150 f. Tese (Doutorado em Engenharia de Recursos Naturais da Amazônia) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2025. Disponível em: https://repositorio.ufpa.br/handle/2011/18002. Acesso em:.https://repositorio.ufpa.br/handle/2011/18002This studypresentsanoptimizationmodelforsweptbladesofhorizontal-axis turbines, couplingtheeffectsofblade sweep and adiffuser.Theformulation,groundedin Blade ElementMomentumTheory,isextendedbyincorporatingthediffuserefficiency(ηd) and diffuserthrustcoefficient(CTd), aswellasaradialtransformationfunctionthatmaps the bladesectionsalongthecurvedspan.Resultsforthediffuser-augmentedhydrokinetic turbine indicatethatbladeswith sweep angles around ±30◦ preventcavitationbykeeping the relativevelocityW belowthecriticalcavitationvelocity VCAV , whileincreasingchord and circulation(Γ) intheouterbladeregions,withnorelevantchangesinthePrandtl tip-loss factor.Fortheaerodynamicassessmentofthe NREL PhaseVI turbine, themodel predictions arecomparedagainstexperimentaldataavailableinthe NREL PhaseVI literature, whichareusedasreferenceforevaluationandvalidationanddonotcorrespond to experimentsconductedwithinthiswork.Inthisstage,forward sweep at βi = −30◦ increased themaximumpowercoefficientto CP,max = 0.40, approximately12%higher than thereportedexperimentalvalueforthestraightblade,whereasbackward sweep at βi = +30◦ reproduced thereferenceperformance,withtheoptimumconditionshifted towardhighertip-speedratios.Overall,theproposedmodelprovedeffectiveinmitigating cavitation,improvingenergyextraction,andreducingaxialloads,therebyconstitutinga promising toolforthedesignofhydrokineticturbinesoperatinginlow-velocityflows,such as thosetypicaloftheAmazonregion.ptAcesso AbertoAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Pás curvadas.Efeito sweep.Difusor.Cavitação.Turbinas Hidrocinéticas.Otimização dapá.NRELPhaseVI.Swept blades.Sweepeffect.Diffuser.Cavitation.Hydrokineticturbines.Bladeoptimization.NRELPhaseVI.O efeito sweep não otimização de pás de turbinas hidrocinéticas de eixo horizontal com difusorThe sweep effect in the optimization of horizontal axis hydrokinetic turbines for the amazonTeseCNPQ::ENGENHARIASMODELAGEM E SIMULAÇÃO DE PROCESSOSUSO E TRANSFORMAÇÃO DE RECURSOS NATURAIS