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Large Eddy Simulation of Sound Sources on a Cambered Airfoil

Bharadwaj Ananthan, Varun and Dierke, Jürgen and Ewert, Roland and Kreuzinger, Johannes (2021) Large Eddy Simulation of Sound Sources on a Cambered Airfoil. In: DAGA 2021 - 47. Jahrestagung für Akustik, pp. 1387-1390. DAGA 2021 - 47. Jahrestagung für Akustik, 15.-18. Aug. 2021, Vienna, Austria. ISBN ISBN: 978-3-939296-18-8.

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Abstract

n the framework of MGLET, Wall-Modeled LES is ap-plied and validated on a cambered airfoil, i.e., DU96-180.The onset of turbulence for the WMLES is facilitated byapplying roughness on the profile. The significance ofthis roughness on the near-wall flow and far-field acous-tics are discussed. In contrary to the observations madein Larsson et al. (2016), the SPL prediction is not only lim-ited uptof=uτ/δrather across a wide range of frequen-cies. The sound pressure level spectrum shows a goodagreement to the experimental data reported in BANC-II. Furthermore, the prediction capabilities of the WM-LES is further verified on a noise reduction by retro-fittedserrations. The method reproduces the widely reported effect of serrations, i.e., a reduction in low-mid frequencyranges and an additional noise in higher frequencies. The study strongly advocates for the use of WMLES as a highly effective scale resolving simulation method,capable of producing the relevant near-wall and far-fieldphysics, required for accurate sound prediction from air-frame components

Item URL in elib:https://elib.dlr.de/148138/
Document Type:Conference or Workshop Item (Speech)
Title:Large Eddy Simulation of Sound Sources on a Cambered Airfoil
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bharadwaj Ananthan, VarunVarun.BharadwajAnanthan (at) dlr.deUNSPECIFIED
Dierke, JürgenJuergen.Dierke (at) dlr.deUNSPECIFIED
Ewert, RolandRoland.Ewert (at) dlr.deUNSPECIFIED
Kreuzinger, JohannesKM Turbulenz GmbH, j.kreuzinger (at) km-turbulenz.deUNSPECIFIED
Date:October 2021
Journal or Publication Title:DAGA 2021 - 47. Jahrestagung für Akustik
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1387-1390
Editors:
EditorsEmailEditor's ORCID iD
Bharadwaj Ananthan, VarunVarun.BharadwajAnanthan@dlr.deUNSPECIFIED
Dierke, JürgenJuergen.Dierke@dlr.deUNSPECIFIED
Ewert, RolandRoland.Ewert@dlr.deUNSPECIFIED
Kreuzinger, JohannesKM Turbulenz GmbH, j.kreuzinger@km-turbulenz.deUNSPECIFIED
ISBN:ISBN: 978-3-939296-18-8
Status:Accepted
Keywords:Wall Modelled LES, High-fidelity methods, Noise Reduction, Acoustics
Event Title:DAGA 2021 - 47. Jahrestagung für Akustik
Event Location:Vienna, Austria
Event Type:national Conference
Event Dates:15.-18. Aug. 2021
Organizer:Österreichische Akademie der Wissenschaften, Institut für Schallforschung (ISF) und Deutsche Gesellschaft für Akustik (DEGA)
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Digitalisation
DLR - Program:D - no assignment
DLR - Research theme (Project):D - no assignment
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Bharadwaj Ananthan, Varun
Deposited On:11 Jan 2022 07:55
Last Modified:11 Jan 2022 07:55

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