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Identification of noise sources on a realistic landing gear using numerical phased array methods applied to computational data
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0002-7006-067X
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design.ORCID iD: 0000-0003-0176-5358
KTH, School of Engineering Sciences (SCI), Centres, VinnExcellence Center for ECO2 Vehicle design. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0003-4103-0129
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2017 (English)In: 23rd AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2017Conference paper, Published paper (Other academic)
Abstract [en]

The aerodynamic sound sources on a realistic landing gear are investigated using numerical phased array methods, based on array data extracted from compressible Detached-Eddy Simulations of the flow. Assuming monopole or monopole in a moving medium propagation, the sound sources are identified in the source region through various beamforming approaches: dual linear programming (dual-LP) deconvolution, orthogonal beamforming and CLEAN-SC. The predicted source locations are in good agreement with previous experimental results performed on the same nose landing gear configuration by industrial and academic partners within the ALLEGRA project. Additionally, the modeled sources are used to generate far-field spectra which are subsequently compared to the ones obtained with the Ffowcs Williams-Hawkings acoustic analogy. The results of the dual-LP approach show a good match between the far-field spectra up to a certain frequency threshold cor- responding to the quality of the mesh used. The results demonstrate the potential of numerical phased array methods as a legitimate modeling tool for aeroacoustic simulations in general and as a tool to gain insight into the noise generation mechanisms of landing gear components in particular. 

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2017.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-197671DOI: 10.2514/6.2017-3019Scopus ID: 2-s2.0-85023623568ISBN: 9781624105043 (print)OAI: oai:DiVA.org:kth-197671DiVA: diva2:1052587
Conference
23rd AIAA/CEAS Aeroacoustics Conference
Note

QC 20170608

Available from: 2016-12-07 Created: 2016-12-07 Last updated: 2017-09-18Bibliographically approved

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Bouchouireb, HamzaPignier, NicolasO'Reilly, Ciarán J.Boij, SusannDahan, Jeremy A.
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Aeronautical and Vehicle EngineeringVinnExcellence Center for ECO2 Vehicle designMarcus Wallenberg Laboratory MWL
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