Three-dimensional acoustic energy flow from rotating sound sources

A detailed study of the three-dimensional sound fields around a monopole point source in subsonic and supersonic rotation is investigated. We calculate the sound pressure, the acoustic velocity, as well as the instantaneous and time-averaged acoustic intensity fields with the advanced time approach....

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Autores principales:	Ocker Christof, Pannert Wolfram
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	rotating sound sources supersonic rotational velocity acoustic intensity field advanced time approach Acoustics in engineering. Acoustical engineering TA365-367 Acoustics. Sound QC221-246
Acceso en línea:	https://doaj.org/article/b7e187b33e6f4f35851175ddfaa0c190
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id	oai:doaj.org-article:b7e187b33e6f4f35851175ddfaa0c190
record_format	dspace
spelling	oai:doaj.org-article:b7e187b33e6f4f35851175ddfaa0c1902021-12-02T17:10:31ZThree-dimensional acoustic energy flow from rotating sound sources2681-461710.1051/aacus/2021042https://doaj.org/article/b7e187b33e6f4f35851175ddfaa0c1902021-01-01T00:00:00Zhttps://acta-acustica.edpsciences.org/articles/aacus/full_html/2021/01/aacus210066/aacus210066.htmlhttps://doaj.org/toc/2681-4617A detailed study of the three-dimensional sound fields around a monopole point source in subsonic and supersonic rotation is investigated. We calculate the sound pressure, the acoustic velocity, as well as the instantaneous and time-averaged acoustic intensity fields with the advanced time approach. The advanced time approach is applied for sound sources at subsonic and supersonic rotation and yield comparable results as those obtained from the spherical harmonic series expansion method or the solution of the retarded time equation. Further, the direction of the time-averaged acoustic energy flow is derived from the acoustic intensity vectors. It is shown, that the direction of the energy flow path differs from the radial direction and depends on the rotational direction and rotational velocity. Those findings are useful, for example, to improve the acoustic absorption performance of sound absorbers and acoustic liners around turbomachines.Ocker ChristofPannert WolframEDP Sciencesarticlerotating sound sourcessupersonic rotational velocityacoustic intensity fieldadvanced time approachAcoustics in engineering. Acoustical engineeringTA365-367Acoustics. SoundQC221-246ENActa Acustica, Vol 5, p 48 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	rotating sound sources supersonic rotational velocity acoustic intensity field advanced time approach Acoustics in engineering. Acoustical engineering TA365-367 Acoustics. Sound QC221-246
spellingShingle	rotating sound sources supersonic rotational velocity acoustic intensity field advanced time approach Acoustics in engineering. Acoustical engineering TA365-367 Acoustics. Sound QC221-246 Ocker Christof Pannert Wolfram Three-dimensional acoustic energy flow from rotating sound sources
description	A detailed study of the three-dimensional sound fields around a monopole point source in subsonic and supersonic rotation is investigated. We calculate the sound pressure, the acoustic velocity, as well as the instantaneous and time-averaged acoustic intensity fields with the advanced time approach. The advanced time approach is applied for sound sources at subsonic and supersonic rotation and yield comparable results as those obtained from the spherical harmonic series expansion method or the solution of the retarded time equation. Further, the direction of the time-averaged acoustic energy flow is derived from the acoustic intensity vectors. It is shown, that the direction of the energy flow path differs from the radial direction and depends on the rotational direction and rotational velocity. Those findings are useful, for example, to improve the acoustic absorption performance of sound absorbers and acoustic liners around turbomachines.
format	article
author	Ocker Christof Pannert Wolfram
author_facet	Ocker Christof Pannert Wolfram
author_sort	Ocker Christof
title	Three-dimensional acoustic energy flow from rotating sound sources
title_short	Three-dimensional acoustic energy flow from rotating sound sources
title_full	Three-dimensional acoustic energy flow from rotating sound sources
title_fullStr	Three-dimensional acoustic energy flow from rotating sound sources
title_full_unstemmed	Three-dimensional acoustic energy flow from rotating sound sources
title_sort	three-dimensional acoustic energy flow from rotating sound sources
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/b7e187b33e6f4f35851175ddfaa0c190
work_keys_str_mv	AT ockerchristof threedimensionalacousticenergyflowfromrotatingsoundsources AT pannertwolfram threedimensionalacousticenergyflowfromrotatingsoundsources
_version_	1718381520546168832

Three-dimensional acoustic energy flow from rotating sound sources

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