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Plunging Airfoil Motion: Effects of Unequal Ascending and Descending Velocities

2020-06-08Conference object Restricted access
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dc.contributor.authorRodrigues, Diana Carvalho
dc.contributor.authorCamacho, Emanuel
dc.contributor.authorNeves, Fernando M. S. P.
dc.contributor.authorBarata, Jorge M M
dc.contributor.authorSilva, A. R. R.
dc.date.accessioned2020-08-31T10:16:04Z
dc.date.available2020-08-31T10:16:04Z
dc.date.issued2020-06-08
dc.description.abstractBiomimetics is a multidisciplinary area of science studying the development of new technologies, whose source of inspiration is Nature and has given rise to new technologies inspired by biological solutions at macro and nanoscales. Successive work carried out by researchers in this field revealed that flapping wings offers not only benefits but unique aerodynamic advantages when compared to the traditional fixed-wings, especially when approaching small scales. This work presents an experimental study concerning the created vortical structures of a plunging NACA0012 airfoil subjected to an asymmetrical motion at a Reynolds number of 1500 with different reduced frequencies and nondimensional amplitudes. The asymmetric motion studied was based on a velocity triangular wave with special focus in a plunging cycle asymmetry of 75%. Over its plunging motion, the unequal ascending and descending velocities revealed that the airfoil can produce both thrust and lift simultaneously. Leading-Edge Vortex (LEV) formation and its convection over the upper surface of the airfoil was seen as a possible power reduction mechanism which could be a way to improve propulsive and energy extraction efficiencies.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologia and Santander-UBI BID/FE/2019.
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.2514/6.2020-3042pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/10399
dc.language.isoengpt_PT
dc.peerreviewednopt_PT
dc.publisherAmerican Institute of Aeronautics and Astronautics Inc, AIAApt_PT
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relation.publisherversionhttps://arc.aiaa.org/doi/pdf/10.2514/6.2020-3042pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPlunging Airfoilpt_PT
dc.subjectNACA0012 airfoilpt_PT
dc.subjectlow Reynolds numbers effectspt_PT
dc.subjectExperimentalpt_PT
dc.subjectBiomimeticspt_PT
dc.subjectLeading-Edge Vortexpt_PT
dc.titlePlunging Airfoil Motion: Effects of Unequal Ascending and Descending Velocitiespt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FEMS%2F50022%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50022%2F2020/PT
oaire.citation.conferencePlaceVirtual Eventpt_PT
oaire.citation.endPage11pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleAIAA AVIATION 2020 FORUMpt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
person.familyNameRodrigues Camacho
person.familyNameSilva Pereira das Neves
person.familyNameMartins Barata
person.familyNameResende Rodrigues da Silva
person.givenNameEmanuel António
person.givenNameFernando Manuel da
person.givenNameJorge Manuel
person.givenNameAndré
person.identifierhFY_5JYAAAAJ&hl
person.identifierJ-4185-2012
person.identifier.ciencia-id4416-08D8-F83D
person.identifier.ciencia-idBC15-D534-3DCC
person.identifier.ciencia-idF611-BBCC-DAA8
person.identifier.ciencia-id8219-4B2B-E1C7
person.identifier.orcid0000-0002-1648-8368
person.identifier.orcid0000-0002-5826-7459
person.identifier.orcid0000-0001-9014-5008
person.identifier.orcid0000-0002-4901-7140
person.identifier.scopus-author-id11439470600
person.identifier.scopus-author-id11440407500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.embargofctPara ter acesso ao artigo é necessário pagar à American Institute of Aeronautics and Astronauticspt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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