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dc.contributor.authorZarketa-Astigarraga, Ander
dc.contributor.authorPenalba, Markel
dc.contributor.authorMartin-Mayor, Alain
dc.contributor.authorMartinez Agirre, Manex
dc.contributor.otherQuiroga, Ingrid
dc.contributor.otherCárdenas Rondón, Juan A.
dc.contributor.otherMartínez Cava, Alejandro
dc.date.accessioned2024-01-22T15:40:06Z
dc.date.available2024-01-22T15:40:06Z
dc.date.issued2023
dc.identifier.issn1089-7666en
dc.identifier.otherhttps://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=172986en
dc.identifier.urihttps://hdl.handle.net/20.500.11984/6120
dc.description.abstractA transitional flow regime is known to induce complex flow structures upon aerodynamic geometries such as airfoils, and the dynamics of laminar separation bubbles (LSBs) pose a relevant research field. In addition to being affected by the Reynolds value itself, LSBs are shown to be equally sensitive to the surface roughness of the airfoils. The study analyses wind tunnel-derived surface-pressure distribution datasets obtained for a particular airfoil of the standard family developed by the National Advisory Committee for Aeronautics (NACA), namely, the NACA0021, subjected to the range at different angles of attack under two flow configurations that correspond to a clean and roughened surface. The analysis is undertaken via the proper orthogonal decomposition (POD) technique. The results show that the decomposition of the temporal series of surface-pressure data and the processing of the most energetic POD modes recovers the position of the LSBs, properly capturing the closure point of the separation bubbles and, hence, the turbulence transition location. Some of the most energetic POD modes observed are closely related, in terms of shape, to the POD modes present at the reattachment point on a 5:1 rectangular cylinder. This could indicate there is a recognizable pattern in coherent structures of pressure fluctuations when it comes to a reattached flow. Therefore, a principal component analysis such as the POD presented in this study can be used to determine the reattachment position of the flow or the transition point in the presence of a LSB.es
dc.description.sponsorshipGobierno Vascoes
dc.language.isoengen
dc.publisherAIP Publishingen
dc.rights© 2023 AIP Publishingen
dc.titleA proper orthogonal decomposition analysis upon aerodynamic structures under clean and rough conditionsen
dcterms.accessRightshttp://purl.org/coar/access_right/c_abf2en
dcterms.sourcePhysics of Fluidsen
local.contributor.groupMecánica de fluidoses
local.description.peerreviewedtrueen
local.identifier.doihttps://doi.org/10.1063/5.0151454en
local.relation.projectIDinfo:eu-repo/grantAgreement/GV/Programa predoctoral de formación del personal investigador no doctor 2017-2018/PRE_2017_1_0178/CAPV//en
local.relation.projectIDinfo:eu-repo/grantAgreement/GV/Ikertalde Convocatoria 2022-2025/IT1505-22/CAPV/Mecánica de fluidos/en
local.relation.projectIDinfo:eu-repo/grantAgreement/GV/Elkartek 2022/KK-2022-00105/CAPV/Metodología evolutiva para la extensión de vida de componentes eólicos/MEECVEen
local.contributor.otherinstitutionhttps://ror.org/03n6nwv02es
local.contributor.otherinstitutionhttps://ror.org/01cc3fy72es
local.source.detailsVol. 35. N. 5. N. art. 054114en
oaire.format.mimetypeapplication/pdfen
oaire.file$DSPACE\assetstoreen
oaire.resourceTypehttp://purl.org/coar/resource_type/c_6501en
oaire.versionhttp://purl.org/coar/version/c_ab4af688f83e57aaen


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