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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. 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: 0000-0003-0176-5358
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: 0000-0002-9061-4174
2016 (English)In: 22nd AIAA/CEAS Aeroacoustics Conference, 2016Conference paper (Other academic)
Abstract [en]

A numerical method to simulate aerodynamically generated sound and its propagation is presented in this paper. The flow is solved using both analytical expressions and numer- ical 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 acoustic propagation with 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 fo- cus 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
2016.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-185032OAI: oai:DiVA.org:kth-185032DiVA: diva2:918055
Conference
22nd AIAA/CEAS Aeroacoustics Conference, 30 May - 1 June 2016, Lyon, France
Note

QC 20160613

Available from: 2016-04-08 Created: 2016-04-08 Last updated: 2016-06-13Bibliographically approved

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