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Reprint of: Flow filtering and the physical sources of aerodynamic sound

Sinayoko, S and Agarwal, A (2010) Reprint of: Flow filtering and the physical sources of aerodynamic sound. Procedia IUTAM, 1. pp. 94-103. ISSN 2210-9838

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Abstract

The physical sources of sound are expressed in terms of the non-radiating part of the flow. The non-radiating part of the flow can be obtained from convolution filtering, as we demonstrate numerically by using an axi-symmetric jet satisfying the Navier-Stokes equations. Based on the frequency spectrum of the source, we show that the sound sources exhibit more physical behaviour than sound sources based on acoustic analogies. To validate the sources of sound, one needs to let them radiate within the non-radiating flow field. However, our results suggest that the traditional Euler operator linearized about the time-averaged part of the flow should be sufficient to compute the sound field. © 2010 Published by Elsevier Ltd.

Item Type: Article
Uncontrolled Keywords: Aerodynamic sound Flow filtering Physical sources Sound sources
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:31
Last Modified: 27 Nov 2014 19:19
DOI: 10.1016/j.piutam.2010.10.011