Hybrid computational aeroacoustics based on compressible flow data at low Mach numbers | Zendy

Schoder Stefan | Zendy; Toth Florian | Zendy; Kaltenbacher Manfred | Zendy

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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)

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