Green's functions in computational aeroacoustics


Morfey, C.L., Powles, C.J. and Wright, M.C.M. (2011) Green's functions in computational aeroacoustics. International Journal of Aeroacoustics, 10, (2/3), 117-160. (doi:10.1260/1475-472X.10.2-3.117).

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Description/Abstract

The theory of Green's functions for the wave and Helmholtz equations is examined with particular attention to their use in aeroacoustics for the extrapolation of acoustic wavefields from numerical flow simulations. In a new synthesis that permits straightforward generalization of previously published results, spatial and temporal windowing functions are employed to provide equivalent-source expressions to account for both initial and boundary conditions. Detailed results describe the transformation of both source terms and Green's functions to take account of uniform subsonic mean flow, and expressions are given for free-field Green's functions, both with and without flow, in time, frequency and wavenumber domains. Aworked example illustrates the non-uniqueness of the Green's function for a simple one-dimensional bounded problem

Item Type: Article
ISSNs: 1475-472X (print)
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions: University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
Faculty of Engineering and the Environment > Institute of Sound and Vibration Research
ePrint ID: 180895
Date Deposited: 12 Apr 2011 13:28
Last Modified: 27 Mar 2014 19:34
URI: http://eprints.soton.ac.uk/id/eprint/180895

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