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dc.contributor.authorBaghaei, Masoud
dc.contributor.authorBergadà Granyó, Josep Maria
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.date.accessioned2020-01-08T09:35:32Z
dc.date.available2020-01-08T09:35:32Z
dc.date.issued2019-12-11
dc.identifier.citationBaghaei, M.; Bergadà, J.M. Analysis of the forces driving the oscillations in 3D fluidic oscillators. "Energies", 11 Desembre 2019, vol. 12, núm. 24, p. 4720:1-4720:19.
dc.identifier.issn1996-1073
dc.identifier.urihttp://hdl.handle.net/2117/174338
dc.description.abstractOne of the main advantages of fluidic oscillators is that they do not have moving parts, which brings high reliability whenever being used in real applications. To use these devices in real applications, it is necessary to evaluate their performance, since each application requires a particular injected fluid momentum and frequency. In this paper, the performance of a given fluidic oscillator is evaluated at different Reynolds numbers via a 3D-computational fluid dynamics (CFD) analysis. The net momentum applied to the incoming jet is compared with the dynamic maximum stagnation pressure in the mixing chamber, to the dynamic output mass flow, to the dynamic feedback channels mass flow, to the pressure acting to both feedback channels outlets, and to the mixing chamber inlet jet oscillation angle. A perfect correlation between these parameters is obtained, therefore indicating the oscillation is triggered by the pressure momentum term applied to the jet at the feedback channels outlets. The paper proves that the stagnation pressure fluctuations appearing at the mixing chamber inclined walls are responsible for the pressure momentum term acting at the feedback channels outlets. Until now it was thought that the oscillations were driven by the mass flow flowing along the feedback channels, however in this paper it is proved that the oscillations are pressure driven. The peak to peak stagnation pressure fluctuations increase with increasing Reynolds number, and so does the pressure momentum term acting onto the mixing chamber inlet incoming jet
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.lcshOscillations
dc.subject.lcshComputational fluid dynamics
dc.subject.otherFluidic oscillators design
dc.subject.other3D-computational fluid dynamics (CFD)
dc.subject.otherFlow control
dc.subject.otherForces driving the oscillation
dc.titleAnalysis of the forces driving the oscillations in 3D fluidic oscillators
dc.typeArticle
dc.subject.lemacOscil·ladors
dc.subject.lemacDinámica de fluids computacional
dc.subject.lemacOscil·lacions
dc.contributor.groupUniversitat Politècnica de Catalunya. TUAREG - Turbulence and Aerodynamics in Mechanical and Aerospace Engineering Research Group
dc.identifier.doi10.3390/en12244720
dc.relation.publisherversionhttps://www.mdpi.com/1996-1073/12/24/4720
dc.rights.accessOpen Access
drac.iddocument26156396
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO/1PE/FIS2016-77849-R
upcommons.citation.authorBaghaei, M.; Bergadà, J.M.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameEnergies
upcommons.citation.volume12
upcommons.citation.number24
upcommons.citation.startingPage4720:1
upcommons.citation.endingPage4720:19


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