Nonlinear disturbance evolution in a two-dimensional boundary layer along an elastic plate and induced radiated sound
dc.contributor.author | GOBERT, Marie-Laure |
dc.contributor.author
hal.structure.identifier | EHRENSTEIN, Uwe
|
dc.contributor.author | ASTOLFI, Jacques Andre |
dc.contributor.author
hal.structure.identifier | BOT, Patrick
|
dc.date.accessioned | 2014 |
dc.date.available | 2014 |
dc.date.issued | 2010 |
dc.date.submitted | 2014 |
dc.identifier.issn | 0997-7546 |
dc.identifier.uri | http://hdl.handle.net/10985/8934 |
dc.description.abstract | The 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.sponsorship | The authors gratefully acknowledge Thales Underwater Systems and DCNS for their financial support to this work. |
dc.language.iso | en |
dc.publisher | Elsevier |
dc.rights | Post-print |
dc.subject | Boundary-layer flow over flexible plates |
dc.subject | Numerical simulation |
dc.subject | Radiated sound |
dc.subject | Lighthil's analogy |
dc.title | Nonlinear disturbance evolution in a two-dimensional boundary layer along an elastic plate and induced radiated sound |
dc.identifier.doi | 10.1016/j.euromechflu.2009.12.001 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Paris |
dc.subject.hal | Physique: Dynamique des Fluides |
dc.subject.hal | Informatique: Analyse numérique |
dc.subject.hal | Informatique: Modélisation et simulation |
dc.subject.hal | Sciences de l'ingénieur: Acoustique |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des fluides |
ensam.audience | Internationale |
ensam.page | 105-118 |
ensam.journal | European Journal of Mechanics - B/Fluids |
ensam.volume | 29 |
ensam.issue | 2 |
hal.description.error | {"duplicate-entry":{"hal-00433149":{"doi":"1.0"},"hal-01084117":{"doi":"1.0"}}} |
hal.identifier | hal-01084117 |
hal.version | 1 |
hal.submission.permitted | updateMetadata |
hal.status | accept |
dc.identifier.eissn | 1873-7390 |