Implementation of Aeroacoustic Methods in OpenFOAM

Implementation of Aeroacoustic Methods in OpenFOAM

A general method is established for external low Mach-number flows where aeroacoustic analogies are used to decouple the sound generation from the sound propagation. The CFD solver OpenFOAM is used to compute the flow induced sound sources and Ffowcs-Williams and Hawkings acoustic analogy is impleme...

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Main Author: Sjöberg, Erika
Format: Others
Language:English
Published: KTH, MWL Marcus Wallenberg Laboratoriet 2016
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198512
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spelling ndltd-UPSALLA1-oai-DiVA.org-kth-1985122016-12-17T05:11:05ZImplementation of Aeroacoustic Methods in OpenFOAMengSjöberg, ErikaKTH, MWL Marcus Wallenberg Laboratoriet2016A general method is established for external low Mach-number flows where aeroacoustic analogies are used to decouple the sound generation from the sound propagation. The CFD solver OpenFOAM is used to compute the flow induced sound sources and Ffowcs-Williams and Hawkings acoustic analogy is implemented to calculate the propagation of sound. Incompressible and compressible source data is gathered for a test case and upon evaluation of the noise emission the assumption of incompressibility prove to be valid for a low Mach-number flow. Furthermore the advantage of non-reflecting boundary conditions in OpenFOAM is appraised and found to be effective. Lastly the method is tested on a more complicated test case in terms of a generic side mirror and results are found to agree well with previous studies. Student thesisinfo:eu-repo/semantics/bachelorThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198512TRITA-AVE, 1651-7660 ; 2016:01application/pdfinfo:eu-repo/semantics/openAccess
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language English
format Others
sources NDLTD
description A general method is established for external low Mach-number flows where aeroacoustic analogies are used to decouple the sound generation from the sound propagation. The CFD solver OpenFOAM is used to compute the flow induced sound sources and Ffowcs-Williams and Hawkings acoustic analogy is implemented to calculate the propagation of sound. Incompressible and compressible source data is gathered for a test case and upon evaluation of the noise emission the assumption of incompressibility prove to be valid for a low Mach-number flow. Furthermore the advantage of non-reflecting boundary conditions in OpenFOAM is appraised and found to be effective. Lastly the method is tested on a more complicated test case in terms of a generic side mirror and results are found to agree well with previous studies.
author Sjöberg, Erika
spellingShingle Sjöberg, Erika
Implementation of Aeroacoustic Methods in OpenFOAM
author_facet Sjöberg, Erika
author_sort Sjöberg, Erika
title Implementation of Aeroacoustic Methods in OpenFOAM
title_short Implementation of Aeroacoustic Methods in OpenFOAM
title_full Implementation of Aeroacoustic Methods in OpenFOAM
title_fullStr Implementation of Aeroacoustic Methods in OpenFOAM
title_full_unstemmed Implementation of Aeroacoustic Methods in OpenFOAM
title_sort implementation of aeroacoustic methods in openfoam
publisher KTH, MWL Marcus Wallenberg Laboratoriet
publishDate 2016
url http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198512
work_keys_str_mv AT sjobergerika implementationofaeroacousticmethodsinopenfoam
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