Computational aeroacoustics algorithms: Non-uniform grids

Philip John Morris, Cathy Chung, Thomas S. Chyczewski, Lyle Norman Long

Research output: Contribution to conferencePaper

2 Citations (Scopus)

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

Fingerprint

Computational aeroacoustics
Acoustics
Circular cylinders
Scattering
Acoustic impedance
Boundary conditions
Bandwidth
Geometry

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Engineering (miscellaneous)

Cite this

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.
Morris, Philip John ; Chung, Cathy ; Chyczewski, Thomas S. ; Long, Lyle Norman. / Computational aeroacoustics algorithms : Non-uniform grids. Paper presented at AIAA Fluid Dynamics Conference, 1994, Colorado Springs, United States.
@conference{e30fb73e338d45799a9de5380c27f96b,
title = "Computational aeroacoustics algorithms: Non-uniform grids",
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.",
author = "Morris, {Philip John} and Cathy Chung and Chyczewski, {Thomas S.} and Long, {Lyle Norman}",
year = "1994",
month = "1",
day = "1",
language = "English (US)",
note = "AIAA Fluid Dynamics Conference, 1994 ; Conference date: 20-06-1994 Through 23-06-1994",

}

Morris, PJ, Chung, C, Chyczewski, TS & Long, LN 1994, 'Computational aeroacoustics algorithms: Non-uniform grids' Paper presented at AIAA Fluid Dynamics Conference, 1994, Colorado Springs, United States, 6/20/94 - 6/23/94, .

Computational aeroacoustics algorithms : Non-uniform grids. / Morris, Philip John; Chung, Cathy; Chyczewski, Thomas S.; Long, Lyle Norman.

1994. Paper presented at AIAA Fluid Dynamics Conference, 1994, Colorado Springs, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Computational aeroacoustics algorithms

T2 - Non-uniform grids

AU - Morris, Philip John

AU - Chung, Cathy

AU - Chyczewski, Thomas S.

AU - Long, Lyle Norman

PY - 1994/1/1

Y1 - 1994/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84997783107&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84997783107&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84997783107

ER -

Morris PJ, Chung C, Chyczewski TS, Long LN. Computational aeroacoustics algorithms: Non-uniform grids. 1994. Paper presented at AIAA Fluid Dynamics Conference, 1994, Colorado Springs, United States.