CUED Publications database

On applications of high-frequency asymptotics in aeroacoustics.

Peake, N (2004) On applications of high-frequency asymptotics in aeroacoustics. Philos Trans A Math Phys Eng Sci, 362. pp. 673-696. ISSN 1364-503X

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Abstract

The aim of this paper is to survey a range of applications of high-frequency asymptotic methods in aeroacoustics. Specifically, we are concerned with problems associated with noise generation, propagation and scattering as found in large modern aeroengines. With regard to noise generation, we consider the interaction between high-frequency vortical waves and thin aerofoils, with particular emphasis being placed on the way in which the vortical waves act on the non-uniform mean flow around the aerofoil. A ray-theoretic description of the resulting sound as it propagates along the engine intake is then presented, followed by consideration of the diffraction of these rays by the (possibly asymmetric) intake lip to produce sound in the far field. A range of more detailed possible extensions is also presented.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:41
Last Modified: 10 Mar 2014 17:07
DOI: 10.1098/rsta.2003.1340