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Development of numerical techniques for near-field aeroacoustic computations

Development of numerical techniques for near-field aeroacoustic computations

Djambazov, G., Lai, C.-H. and Pericleous, K. ORCID: 0000-0002-7426-9999 (1999) Development of numerical techniques for near-field aeroacoustic computations. International Journal for Numerical Methods in Fluids, 29 (6). pp. 719-731. ISSN 0271-2091 (Print), 1097-0363 (Online) (doi:10.1002/(SICI)1097-0363(19990330)29:6<719::AID-FLD810>3.0.CO;2-P)

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Abstract

This work is concerned with the development of a numerical scheme capable of producing accurate simulations of sound propagation in the presence of a mean flow field. The method is based on the concept of variable decomposition, which leads to two separate sets of equations. These equations are the linearised Euler equations and the Reynolds-averaged Navier–Stokes equations. This paper concentrates on the development of numerical schemes for the linearised Euler equations that leads to a computational aeroacoustics (CAA) code. The resulting CAA code is a non-diffusive, time- and space-staggered finite volume code for the acoustic perturbation, and it is validated against analytic results for pure 1D sound propagation and 2D benchmark problems involving sound scattering from a cylindrical obstacle. Predictions are also given for the case of prescribed source sound propagation in a laminar boundary layer as an illustration of the effects of mean convection. Copyright © 1999 John Wiley & Sons, Ltd.

Item Type: Article
Uncontrolled Keywords: sound propagation, sound scattering, aeroacoustics
Subjects: Q Science > QA Mathematics
Pre-2014 Departments: School of Computing & Mathematical Sciences
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group
School of Computing & Mathematical Sciences > Department of Computer Systems Technology
School of Computing & Mathematical Sciences > Department of Mathematical Sciences
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Last Modified: 14 Oct 2016 08:59
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/140

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