Acoustics of turbulent eddies impinging on a semi-infinite rigid wedge
Résumé
In the present work the far field sound generated by the interaction of isotropic, homogeneous turbulence with a semi-infinite rigid wedge is studied using the theory of vortex sound. The scattering properties of the wedge are modelled with the asymptotic Green's function for the diffraction around a semi-infinite rigid wedge, under the assumption that the source distance from the wedge is acoustically compact. The source term is modelled as a homogeneous, isotropic turbulent quantity and results are shown for different wedge angles and turbulent length scales. Larger eddies dominate the far field sound radiation in the low frequency regime, while smaller ones contribute for higher frequencies and larger wedge angles. The results show that the larger the wedge angle the less noise is generated. A scaling law is obtained that is in agreement with other studies in literature.
Domaines
Sciences de l'ingénieur [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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