Noise Generation Analysis of a Cylindrical Cavity by LES and Global Instability | Zendy

Fabien Méry | Zendy; Daniel Mincu | Zendy; G. Casalis | Zendy; Aloïs Sengissen | Zendy

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Noise Generation Analysis of a Cylindrical Cavity by LES and Global Instability

Author(s) -

Fabien Méry,

Daniel Mincu,

G. Casalis,

Aloïs Sengissen

Publication year - 2009

Publication title -

citeseer x (the pennsylvania state university)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2009-3205

Subject(s) - instability , acoustics , noise (video) , physics , computer science , geology , mechanics , artificial intelligence , image (mathematics)

This paper is devoted to the computation of a compressible and high-Reynolds flow over a cylindrical cavity present on a flat plate. Two approaches are used : LES on one hand and linear stability analysis on the other one. The mean part of the former acts as input for the latter which consists in determining the corresponding eigenmodes. The results are compared to the unsteady part of the LES. The most amplified frequency in the LES seems to correspond to an eigenmode and a good agreement is also obtained when comparing the perturbed flow field.

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