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Nonlinear disturbance evolution in a boundary layer along an elastic plate and induced radiated sound

hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorGOBERT, Marie-Laure
hal.structure.identifierInstitut de Recherche sur les Phénomènes Hors Equilibre [IRPHE]
dc.contributor.authorEHRENSTEIN, Uwe
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorASTOLFI, André
hal.structure.identifierInstitut de Recherche de l'Ecole Navale [IRENAV]
dc.contributor.authorBOT, Patrick
dc.date.accessioned2021-05-14T09:58:49Z
dc.date.available2021-05-14T09:58:49Z
dc.date.issued2010-03
dc.identifier.issn0997-7546
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/77979
dc.descriptionThe interaction between a boundary-layer flow and an elastic plate is addressed by direct numerical simulation, taking into account the full coupling between the fluid flow and the flexible wall. The convectively unstable flow state is harmonically forced and two-dimensional nonlinearly saturated wavelike disturbances are computed along archetype-plates with respect to stiffness and natural frequencies. In the aim of determining the low-Mach-number radiated sound for the system, the simulation data are used to solve the Lighthill’s equation in terms of a Green’s function in the wavenumber-frequency space.Different degrees of fluid-structure coupling are implemented in the radiated sound model and the resulting acoustic pressure levels are compared. The sound radiation levels are shown to be increased in the presence of flexible walls with however significant differences in the radiated pressure levels for different coupling assumptions
dc.description.abstractEnThe interaction between a boundary-layer flow and an elastic plate is addressed by direct numerical simulation, taking into account the full coupling between the fluid flow and the flexible wall. The convectively unstable flow state is harmonically forced and two-dimensional nonlinearly saturated wavelike disturbances are computed along archetype-plates with respect to stiffness and natural frequencies. In the aim of determining the low-Mach-number radiated sound for the system, the simulation data are used to solve the Lighthill’s equation in terms of a Green’s function in the wavenumber-frequency space.Different degrees of fluid-structure coupling are implemented in the radiated sound model and the resulting acoustic pressure levels are compared. The sound radiation levels are shown to be increased in the presence of flexible walls with however significant differences in the radiated pressure levels for different coupling assumptions
dc.language.isoen
dc.publisherElsevier
dc.subject.enBoundary-layer flow over flexible plates
dc.subject.enNumerical simulation
dc.subject.enRadiated sound
dc.subject.enLighthil's analogy
dc.title.enNonlinear disturbance evolution in a boundary layer along an elastic plate and induced radiated sound
dc.typeArticle de revue
dc.identifier.doi10.1016/j.euromechflu.2009.12.001
dc.subject.halPhysique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
dc.subject.halInformatique [cs]/Analyse numérique [cs.NA]
dc.subject.halInformatique [cs]/Modélisation et simulation
dc.subject.halSciences de l'ingénieur [physics]/Acoustique [physics.class-ph]
dc.subject.halSciences de l'ingénieur [physics]/Mécanique [physics.med-ph]/Mécanique des fluides [physics.class-ph]
bordeaux.journalEuropean Journal of Mechanics - B/Fluids
bordeaux.page105-118
bordeaux.volume29
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.issue2
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-01084117
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01084117v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=European%20Journal%20of%20Mechanics%20-%20B/Fluids&rft.date=2010-03&rft.volume=29&rft.issue=2&rft.spage=105-118&rft.epage=105-118&rft.eissn=0997-7546&rft.issn=0997-7546&rft.au=GOBERT,%20Marie-Laure&EHRENSTEIN,%20Uwe&ASTOLFI,%20Andr%C3%A9&BOT,%20Patrick&rft.genre=article


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