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Simulations of a liner cell using a frequency-domain linearized Navier-Stokes methodology
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-9061-4174
University of Cambridge, Department of Engineering, United Kingdom.
2013 (English)In: 19th AIAA/CEAS Aeroacoustics Conference, 2013Conference paper, Published paper (Refereed)
Abstract [en]

We present numerical simulations of a liner concept, where a thin layer of metallic foam material is located in between the perforated plate and the backing cavity. This liner concept was first presented in Ref 1, where experimental tests showed that the acoustic characteristics of such a liner are nearly independent of both flow and temperature. We use the linearized Navier-Stokes equations in frequency domain to simulate the acoustic waves and the coupling to the hydrodynamic field in the main duct and the liner neck. The effect of the metallic foam is modeled using the Delany-Bazley model. The numerical results are in good agreement with the experimental results presented in Ref 1. In addition, a parameter study on the influence of the flow resistivity of the metallic foam, mean flow speed and mean flow temperature is performed.

Place, publisher, year, edition, pages
2013.
Keyword [en]
Acoustic characteristic, Delany-Bazley models, Frequency domains, Hydrodynamic field, Linearized Navier-Stokes, Linearized navier-stokes equations, Numerical results, Parameter studies
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-133272Scopus ID: 2-s2.0-84883670821ISBN: 978-162410213-4 (print)OAI: oai:DiVA.org:kth-133272DiVA: diva2:660682
Conference
19th AIAA/CEAS Aeroacoustics Conference; Berlin; Germany; 27 May 2013 through 29 May 2013
Note

QC 20131030

Available from: 2013-10-30 Created: 2013-10-29 Last updated: 2016-09-29Bibliographically approved

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Efraimsson, Gunilla

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Output format
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