Abstract
AbstractA 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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