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Aeroacoustic Measurements and Validations of Numerical Simulations for the Case of a Generic Vehicle Structure

Zeibig, A. and Achilles, S. and Wilde, A. and Sabanca, M. and Delfs, J. (2005) Aeroacoustic Measurements and Validations of Numerical Simulations for the Case of a Generic Vehicle Structure. 12th International Conference on Sound and Vibration, Lissabon (p), 11.-14.07.2005.

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Abstract

The aim of the project Akusim (part of the German research network Quiet traffic) was the numerical simulation of the flow induced noise generation and the radiation with hybrid calculation methods. For this purpose a generic structure (semi-cylinder with triangular wedge) was defined. To validate the results of the numerical simulations, experimental measurements of the flow field as well as the sound field were carried out, which include hotwire measurements, measurements of the wall-pressure fluctuations as well as measurements of the acoustic far field pressure. The results of both measurements and the numerical simulations are compared. Depending on the test conditions (tripping of the boundary layer) the measured sound and flow field data exhibit two different resonances which also show up in two different numerical simulations. To examine the relation between the measured flow field data and sound field data, the correlation between wall pressure fluctuations and acoustic far field pressure was determined. The correlations also show two different resonances and their dependency on the test conditions.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Aeroacoustic Measurements and Validations of Numerical Simulations for the Case of a Generic Vehicle Structure
Authors:
AuthorsInstitution or Email of Authors
Zeibig, A.Technische Universität Dresden
Achilles, S.Technische Universität Dresden
Wilde, A.Technische Universität Dresden
Sabanca, M.UNSPECIFIED
Delfs, J.UNSPECIFIED
Date:2005
Status:Published
Keywords:Aeroacoustic, vortex shedding, DRP, Lattice Boltzmann, strut
Event Title:12th International Conference on Sound and Vibration, Lissabon (p), 11.-14.07.2005
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:53

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