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Evaluation and development of non-reflective boundary conditions for aeroacoustic simulations

Evaluation and development of non-reflective boundary conditions for aeroacoustic simulations
Evaluation and development of non-reflective boundary conditions for aeroacoustic simulations
The performance of several non-reflective acoustic boundary conditions is quantitatively compared using a plane wave test configuration. The study uses a high-order linearized Euler equation solver to find a non-reflective boundary condition which gives good performance in a variety of cases. The performance for acoustic waves with varying frequency and incident angle is compared in flows with varying Mach number. The performance of buffer zone, far-field, and characteristic non-reflective methods is compared. Some non-reflective boundary methods, such as buffer zones, contain tuneable parameters that are optimized in the current work. This provides a more comprehensive evaluation than previous studies which used constant values of the tuneable parameters. A new generic non-reflective zonal characteristic boundary condition is proposed and is shown to give improved performance in comparison to other tested methods. The performance of the proposed boundary condition is also demonstrated in a two-dimensional airfoil turbulence-interaction case that includes vortical waves leaving the domain, and in a three-dimensional duct mode case.
Gill, James R.
1e31eb24-f833-462e-b610-23b5b28e7285
Fattah, Ryu
4f7fa45a-62c0-40a0-8f1b-52732a4b2a8c
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Gill, James R.
1e31eb24-f833-462e-b610-23b5b28e7285
Fattah, Ryu
4f7fa45a-62c0-40a0-8f1b-52732a4b2a8c
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421

Gill, James R., Fattah, Ryu and Zhang, Xin (2015) Evaluation and development of non-reflective boundary conditions for aeroacoustic simulations. 21st AIAA/CEAS Aeroacoustics Conference, Dallas, United States. 22 - 25 Jun 2015.

Record type: Conference or Workshop Item (Paper)

Abstract

The performance of several non-reflective acoustic boundary conditions is quantitatively compared using a plane wave test configuration. The study uses a high-order linearized Euler equation solver to find a non-reflective boundary condition which gives good performance in a variety of cases. The performance for acoustic waves with varying frequency and incident angle is compared in flows with varying Mach number. The performance of buffer zone, far-field, and characteristic non-reflective methods is compared. Some non-reflective boundary methods, such as buffer zones, contain tuneable parameters that are optimized in the current work. This provides a more comprehensive evaluation than previous studies which used constant values of the tuneable parameters. A new generic non-reflective zonal characteristic boundary condition is proposed and is shown to give improved performance in comparison to other tested methods. The performance of the proposed boundary condition is also demonstrated in a two-dimensional airfoil turbulence-interaction case that includes vortical waves leaving the domain, and in a three-dimensional duct mode case.

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e-pub ahead of print date: June 2015
Venue - Dates: 21st AIAA/CEAS Aeroacoustics Conference, Dallas, United States, 2015-06-22 - 2015-06-25
Organisations: Aeronautics, Astronautics & Comp. Eng

Identifiers

Local EPrints ID: 378718
URI: http://eprints.soton.ac.uk/id/eprint/378718
PURE UUID: b1c2ea9d-e4d2-4a89-98ef-e4b34a03de71

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Date deposited: 18 Jul 2015 16:37
Last modified: 01 Nov 2023 17:02

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Contributors

Author: James R. Gill
Author: Ryu Fattah
Author: Xin Zhang

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