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Hybrid computational aeroacoustics based on compressible flow data at low Mach numbers
Author(s) -
Schoder Stefan,
Toth Florian,
Kaltenbacher Manfred
Publication year - 2017
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201710312
Subject(s) - mach number , compressible flow , compressibility , aeroacoustics , computational aeroacoustics , flow (mathematics) , acoustics , helmholtz free energy , mach wave , computer science , physics , mechanics , sound pressure , thermodynamics
In some practical applications (e.g. cavity with a lip), even at low Mach numbers, acoustic feedback mechanisms excite flow structures. The compressible flow simulation cannot distinguish between a pure fluid dynamic part and acoustic phenomena. With this in mind, we propose a workflow based on Helmholtz‐Hodge decomposition, to extract pure source terms of the compressible flow simulation, to model the sound radiation. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)