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Numerical Simulation of the Sound Generation and the Sound Propagation from Air Intakes in an Aircraft Cabin

Konstantinov, Mikhail and Wagner, Claus (2018) Numerical Simulation of the Sound Generation and the Sound Propagation from Air Intakes in an Aircraft Cabin. In: New Results in Numerical and Experimental Fluid Mechanics XI Notes on Numerical Fluid Mechanics an Multidisciplinary Design 136, 136. Springer. pp. 623-633. ISBN 978-3-319-64518-6. ISSN 1612-2909

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Abstract

The paper presents results of unsteady Reynolds-averaged Navier-Stokes simulations (URANS), Delayed Detached Eddy Simulations (DDES) and Large Eddy Simulations (LES) of the flow and the noise propagation in a segment of the DLR’s cabin test facility Do728. Since the weakly compressible Navier-Stokes equations were solved in all cases, spectra of the sound pressure levels (SPL) were analyzed based on Fast Fourier Transforms of the predicted pressure fields. It was shown that LES on hexahedral meshes predict SPLs in good agreement with microphone measurements in the Do728 cabin. A comparison with predictions based on a hybrid approach involving the solution of a wave equation together with non-reflective boundary conditions on the one hand, and a Ffowcs Williams - Hawkings (FW-H) model on the other hand, revealed that the impact of the imperfect acoustic boundary condition in the LES on the sound pressure level at the receiver point is negligible. Thus, it was demonstrated that reliable predictions of SPLs in an aircraft cabin are possible if the corresponding LES can be performed.

Item URL in elib:https://elib.dlr.de/114870/
Document Type:Book Section
Additional Information:ISSN: 1860-0824 (elektronisch); ISBN: 978-3-319-64519-3 (eBook); Paper DOI: 10.1007/978-3-319-64519-3_56
Title:Numerical Simulation of the Sound Generation and the Sound Propagation from Air Intakes in an Aircraft Cabin
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Konstantinov, Mikhailmikhail.konstantinov (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics XI
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:136
Page Range:pp. 623-633
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen
Heller, GerdAirbus Bremen
Krämer, EwaldUNI Stuttgart
Wagner, ClausDLR Göttingen
Bansmer, StephanTU Braunschweig
Radespiel, RolfTU Braunschweig
Semaan, RichardTU Braunschweig
Publisher:Springer
Series Name:Notes on Numerical Fluid Mechanics an Multidisciplinary Design 136
ISSN:1612-2909
ISBN:978-3-319-64518-6
Status:Published
Keywords:URANS-DDES-LES-Acoustic analogies-Cabin air intake
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Fluid Systems, GO
Deposited By: Bachmann, Barbara
Deposited On:07 Dec 2017 15:29
Last Modified:24 May 2018 10:38

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