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Simulation of Aerodynamically Generated Noise Propagation Using the Wave Expansion Method
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Aerodynamics.ORCID iD: 0000-0002-6813-4764
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.ORCID iD: 0000-0002-9061-4174
2016 (English)In: 22nd AIAA/CEAS Aeroacoustics Conference, 2016, American Institute of Aeronautics and Astronautics, 2016Conference paper (Other academic)
Abstract [en]

A numerical method to simulate aerodynamically generated sound and its propagation is presented in this paper. The flow equations are solved using both analytical expressions and numerical methods. The aeroacoustic source terms are then defined by using the aeroacoustic analogies of Lighthill, Ffowcs-Williams and Hawkings, Powell and Howe, and are evaluated from the flow solutions. The propagation of the sound waves generated using these sources is then performed using the wave expansion method. This is a discretization method suitable for solving wave propagation through inhomogeneous potential flows. Two different cases are considered in the study, a co-rotating vortex pair and the flow around a 2D cylinder at Re=150. The focus of the work presented is to show a robust introduction of aeroacoustic sources in a wave expansion acoustic propagation solution procedure. The numerical results are compared to experimental and numerical results from other studies of the same configurations.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2016.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-196677ScopusID: 2-s2.0-84982957769OAI: oai:DiVA.org:kth-196677DiVA: diva2:1047464
Conference
22nd AIAA/CEAS Aeroacoustics Conference
Note

QC 20161206

Available from: 2016-11-17 Created: 2016-11-17 Last updated: 2016-12-06Bibliographically approved

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Hammar, JohanO'Reilly, Ciarán J.Efraimsson, Gunilla
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