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Investigation of nonreflective boundary conditions for computational aeroacoustics

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Author

  • Mirela Caraeni
  • Laszlo Fuchs

Summary, in English

Direct aeroacoustic computations require nonreflective boundary conditions that allow disturbances to leave the domain freely without anomalous reflections. In the present paper we analyze a series of nonreflective boundary conditions already published in the literature and propose an improved outflow nonreflective boundary condition with reflection characteristic that is reduced greatly. For the solution of the linearized Euler equations, a sixth-order compact finite-difference algorithm is used together with a sixth-order explicit digital filter that suppresses the high-frequency spurious oscillations in the solution. A number of representative test cases are presented. The new outflow boundary condition is recommended for the simulation of sound produced by turbulence.

Department/s

Publishing year

2006

Language

English

Pages

1932-1940

Publication/Series

AIAA Journal

Volume

44

Issue

9

Document type

Journal article

Publisher

American Institute of Aeronautics and Astronautics

Topic

  • Fluid Mechanics and Acoustics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1533-385X