Computational aeroacoustics algorithms: Non-uniform grids

Philip J. Morris, Cathy Chung, Thomas S. Chyczewski, Lyle N. Long

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

In this paper we consider the application of high-order, high-bandwidth numerical schemes to problems in aeroa-coustics. In particular we consider the effect of choice of grid geometry on the solutions. In the first section of the paper, examples of the effect of non-uniform grids on the solution for the propagation of an initially Gaussian and a cylindrical acoustic source are presented. Dispersion-Relation-Preseverving algorithms are used with modifications for the grid non-uniformity. In the second part of the paper we consider acoustic scattering of a periodic source by a finite plate and a circular cylinder. Two types of boundary treatment for the solid surface are described. The first is a traditional solid wall boundary condition. The second treatment replaces the solid object with a region of high acoustic impedance. Comparisions are made between the different approaches and their advantages and disadvantages are discussed. Finally, some preliminary results for the acoustic scattering of a Gaussian pulse by a circular cylinder are described. Two different approaches are used. One uses a uniform Cartesian grid the other uses a body-fitted coordinate system. The latter approach is implemented on a massively parallel computer.

Original languageEnglish (US)
StatePublished - Jan 1 1994
EventAIAA Fluid Dynamics Conference, 1994 - Colorado Springs, United States
Duration: Jun 20 1994Jun 23 1994

Other

OtherAIAA Fluid Dynamics Conference, 1994
CountryUnited States
CityColorado Springs
Period6/20/946/23/94

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Engineering (miscellaneous)

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    Morris, P. J., Chung, C., Chyczewski, T. S., & Long, L. N. (1994). Computational aeroacoustics algorithms: Non-uniform grids. Paper presented at AIAA Fluid Dynamics Conference, 1994, Colorado Springs, United States.