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dc.contributor.authorDuda, Daniel
dc.contributor.authorYanovych, Vitalii
dc.contributor.authorTsymbalyuk, Volodymyr
dc.contributor.authorUruba, Václav
dc.date.accessioned2022-06-06T10:00:29Z-
dc.date.available2022-06-06T10:00:29Z-
dc.date.issued2022
dc.identifier.citationDUDA, D. YANOVYCH, V. TSYMBALYUK, V. URUBA, V. Effect of Manufacturing Inaccuracies on the Wake Past Asymmetric Airfoil by PIV. Energies, 2022, roč. 15, č. 3, s. nestránkováno. ISSN: 1996-1073cs
dc.identifier.issn1996-1073
dc.identifier.uri2-s2.0-85124465349
dc.identifier.urihttp://hdl.handle.net/11025/47713
dc.format27 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherMDPIen
dc.relation.ispartofseriesEnergiesen
dc.rights© authorsen
dc.titleEffect of Manufacturing Inaccuracies on the Wake Past Asymmetric Airfoil by PIVen
dc.typepreprintcs
dc.typepreprinten
dc.rights.accessopenAccessen
dc.type.versiondraften
dc.description.abstract-translatedThe effect of manufacturing geometry deviations on the flow past a NACA 64(3)-618 asymmetric airfoil is studied. This airfoil is 3D printed according to the coordinates from a public database. An optical high-precision 3D scanner, GOM Atos, measures the difference from the idealized model. Based on this difference, another model is prepared with a physical output closer to the ideal model. The velocity in the near wake (0-0.4 chord) is measured by using the Particle Image Velocimetry (PIV) technique. This work compares the wakes past three airfoil realizations, which differ in their similarity to the original design (none of the realizations is identical to the original design). The chord-based Reynolds number ranges from 1.6x104 to 1.6x105. The ensemble average velocity is used for the determination of the wake width and for the rough estimation of the drag coefficient. The lift coefficient is measured directly by using force balance. We discuss the origin of turbulent kinetic energy in terms of anisotropy (at least in 2D) and the length-scales of fluctuations across the wake. The spatial power spectral density is shown. The autocorrelation function of the cross-stream velocity detects the regime of the von Karman vortex street at lower velocities.en
dc.subject.translatedparticle image velocimetryen
dc.subject.translatedwakeen
dc.subject.translated3D scanningen
dc.subject.translatedturbulent kinetic energyen
dc.subject.translatedspectrumen
dc.identifier.doi10.3390/en15031227
dc.identifier.document-number757970500001
dc.identifier.obd43935649
dc.project.IDEF16_026/0008389/LoStr: Výzkumná spolupráce pro dosažení vyšší účinnosti a spolehlivosti lopatkových strojůcs
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