Nonlinear disturbance evolution in a two-dimensional boundary layer along an elastic plate and induced radiated noise - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Journal of Mechanics - B/Fluids Année : 2010

Nonlinear disturbance evolution in a two-dimensional boundary layer along an elastic plate and induced radiated noise

Résumé

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 equation in terms of a Green 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.
Fichier principal
Vignette du fichier
manuscript_gobert_etal_ejmf.pdf (1.14 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00433149 , version 1 (18-11-2009)

Identifiants

Citer

Marie-Laure Gobert, Uwe Ehrenstein, Jacques-André Astolfi, Patrick Bot. Nonlinear disturbance evolution in a two-dimensional boundary layer along an elastic plate and induced radiated noise. European Journal of Mechanics - B/Fluids, 2010, 29 (2), pp.105-118. ⟨10.1016/j.euromechflu.2009.12.001⟩. ⟨hal-00433149⟩
130 Consultations
105 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More