Bernicke, P. und Akkermans, R.A.D. und Ewert, Roland und Buchmann, N. (2015) Towards overset LES for aeroacoustic source prediction. 15th European Turbulence Conference, 2015-08-25 - 2015-08-28, Delft, The Netherlands.
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Kurzfassung
In this contribution an application of a computational aeroacoustics code (CAA) as a hybrid Zonal DNS tool is presented. The here used hybrid approach is based on a novel implementation of the Non-Linear Perturbation Equations (NLPE) extended with viscous terms, denoted as overset since a perturbation analysis is performed on top of a background flow. It is found that Direct Noise Computation results of a cylinder in uniform flow show the dipolar sound radiation characteristic as well as the expected decay of sound pressure level with distance. The extension to LES is illustrated with isotropic decaying turbulence, where the expected -5/3 slope of the reference DNS data is recovered with the LES employing the classical Smagorinsky model.
elib-URL des Eintrags: | https://elib.dlr.de/102462/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Titel: | Towards overset LES for aeroacoustic source prediction | ||||||||||||||||||||
Autoren: |
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Datum: | 25 August 2015 | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | LES, Aeroacoustics, Decaying Homogeneous Turbulence | ||||||||||||||||||||
Veranstaltungstitel: | 15th European Turbulence Conference | ||||||||||||||||||||
Veranstaltungsort: | Delft, The Netherlands | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
Veranstaltungsbeginn: | 25 August 2015 | ||||||||||||||||||||
Veranstaltungsende: | 28 August 2015 | ||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||
HGF - Programmthema: | Flugzeuge | ||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||
DLR - Forschungsgebiet: | L AR - Aircraft Research | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Flugphysik (alt) | ||||||||||||||||||||
Standort: | Braunschweig | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Technische Akustik | ||||||||||||||||||||
Hinterlegt von: | Ewert, Dr.-Ing. Roland | ||||||||||||||||||||
Hinterlegt am: | 02 Feb 2016 14:54 | ||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:08 |
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