Simulation of Aerodynamically Generated Noise Propagation Using the Wave Expansion Method
2016 (English)In: 22nd AIAA/CEAS Aeroacoustics Conference, 2016, American Institute of Aeronautics and Astronautics, 2016Conference paper (Other academic)
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.
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-196677ScopusID: 2-s2.0-84982957769OAI: oai:DiVA.org:kth-196677DiVA: diva2:1047464
22nd AIAA/CEAS Aeroacoustics Conference
QC 201612062016-11-172016-11-172016-12-06Bibliographically approved