Direct simulation of acoustic scattering by aircraft wings and bodies

Olivier A. Laik, Philip John Morris

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

This paper extends a recently introduced method to study the scattering of acoustic waves by body surfaces and flow. A special decomposition of the acoustic wave into its incident and scattered parts is used on the whole computational domain. An incident pressure is specified and the associated particle velocities are computed in the absence of the scattering solid. Then the scattered field is calculated taking into account not only the presence of the body but also flow nonuniformity. The solid boundary treatment is handled by the Impedance Mismatch Method (IMM). Use is made of Dispersion Relation Preserving (DRP) schemes for the spatial discretization and a fourth-order Runge-Kutta method is used for the time integration. The boundary points use Tarn and Webb's nonreflecting boundary conditions. Several acoustic scattering problems are solved including acoustic scattering by a two-dimensional cylinder and a Rankine oval, and scattering by a sphere. The programs are written in Fortran 90 and use the MPI library for parallel communications.

Original languageEnglish (US)
Pages1020-1029
Number of pages10
DOIs
Publication statusPublished - Jan 1 1998
Event4th AIAA/CEAS Aeroacoustics Conference, 1998 - Toulouse, France
Duration: Jun 2 1998Jun 4 1998

Other

Other4th AIAA/CEAS Aeroacoustics Conference, 1998
CountryFrance
CityToulouse
Period6/2/986/4/98

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Aerospace Engineering

Cite this

Laik, O. A., & Morris, P. J. (1998). Direct simulation of acoustic scattering by aircraft wings and bodies. 1020-1029. Paper presented at 4th AIAA/CEAS Aeroacoustics Conference, 1998, Toulouse, France. https://doi.org/10.2514/6.1998-2379