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A Fourier pseudospectral method for some computational aeroacoustics problems

A Fourier pseudospectral method for some computational aeroacoustics problems
A Fourier pseudospectral method for some computational aeroacoustics problems
A Fourier pseudospectral time-domain method is applied to wave propagation problems pertinent to computational aeroacoustics. The original algorithm of the Fourier pseudospectral time-domain method works for periodical problems without the interaction with physical boundaries. In this paper we develop a slip wall boundary condition, combined with buffer zone technique to solve some non-periodical problems. For a linear sound propagation problem whose governing equations could be transferred to ordinary differential equations in pseudospectral space, a new algorithm only requiring time stepping is developed and tested. For other wave propagation problems, the original algorithm has to be employed, and the developed slip wall boundary condition still works. The accuracy of the presented numerical algorithm is validated by benchmark problems, and the efficiency is assessed by comparing with high-order finite difference methods. It is indicated that the Fourier pseudospectral time-domain method, time stepping method, slip wall and absorbing boundary conditions combine together to form a fully-fledged computational algorithm.
1475-472X
279-294
Huang, Xun
44c6d7c9-07ca-436c-9cbe-1ba9a2f834f9
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Huang, Xun
44c6d7c9-07ca-436c-9cbe-1ba9a2f834f9
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421

Huang, Xun and Zhang, Xin (2006) A Fourier pseudospectral method for some computational aeroacoustics problems. International Journal of Aeroacoustics, 5 (3), 279-294.

Record type: Article

Abstract

A Fourier pseudospectral time-domain method is applied to wave propagation problems pertinent to computational aeroacoustics. The original algorithm of the Fourier pseudospectral time-domain method works for periodical problems without the interaction with physical boundaries. In this paper we develop a slip wall boundary condition, combined with buffer zone technique to solve some non-periodical problems. For a linear sound propagation problem whose governing equations could be transferred to ordinary differential equations in pseudospectral space, a new algorithm only requiring time stepping is developed and tested. For other wave propagation problems, the original algorithm has to be employed, and the developed slip wall boundary condition still works. The accuracy of the presented numerical algorithm is validated by benchmark problems, and the efficiency is assessed by comparing with high-order finite difference methods. It is indicated that the Fourier pseudospectral time-domain method, time stepping method, slip wall and absorbing boundary conditions combine together to form a fully-fledged computational algorithm.

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Published date: 2006
Organisations: Aerodynamics & Flight Mechanics

Identifiers

Local EPrints ID: 46232
URI: http://eprints.soton.ac.uk/id/eprint/46232
ISSN: 1475-472X
PURE UUID: 9f4c127e-5917-46c3-9594-69a2250e7679

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Date deposited: 06 Jun 2007
Last modified: 15 Mar 2024 09:19

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Contributors

Author: Xun Huang
Author: Xin Zhang

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