Propagation of Acoustical Waves in an Axisymmetrical Duct With Swirling Mean Flow | Zendy

Boltalova N. | Zendy; Schemel C. | Zendy; Thiele F. | Zendy; Michel U. | Zendy

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Propagation of Acoustical Waves in an Axisymmetrical Duct With Swirling Mean Flow

Author(s) -

Boltalova N.,

Schemel C.,

Thiele F.,

Michel U.

Publication year - 2003

Publication title -

pamm

Language(s) - English

Resource type - Journals

ISSN - 1617-7061

DOI - 10.1002/pamm.200310482

Subject(s) - rotational symmetry , mean flow , duct (anatomy) , mechanics , azimuth , fourier series , physics , acoustics , mathematics , optics , mathematical analysis , turbulence , medicine , pathology

A 3D axisymmetric Computational Aero Acoustic (CAA) procedure is extended to predict the propagation and radiation of the unsteady disturbances from a duct with swirling mean flow into the far field. Based on axisymmetric mean flow and acoustical boundary conditions, the 3D task is decomposed into a series of 2D problems using Fourier series expansions in the azimuthal direction. The numerical procedure is validated by the analytical solution within a solid body rotational, subsonic mean flow in a straight circular duct and the numerical results show a very good agreement.

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