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CAA broadband noise prediction for aeroacoustic design

Ewert, Roland and Dierke, Jürgen and Siebert, Jona and Neifeld, Andrej and Appel, Christina and Siefert, Malte and Kornow, Oliver (2011) CAA broadband noise prediction for aeroacoustic design. Journal of Sound and Vibration (330), pp. 4139-4160. Elsevier. DOI: 10.1016/j.jsv.2011.04.014 ISSN 0022-460X

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Official URL: http://www.journals.elsevier.com/journal-of-sound-and-vibration/

Abstract

The current status of a Computational Aeroacoustics (CAA) approach to simulate broadband noise is reviewed. The method rests on the use of steady Reynolds Averaged Navier-Stokes (RANS) simulation to describe the time-averaged motion of turbulent flow. By means of synthetic turbulence the steady one-point statistics (e.g. turbulence kinetic energy) and turbulent length- and time-scales of RANS are translated into fluctuations having statistics that very accurately reproduce the initial RANS target-setting. The synthetic fluctuations are used to prescribe sound sources which drive linear perturbation equations. The whole approach represents a methodology to solve statistical noise theory with state-of-the-art CAA tools in the time-domain. A brief overview of the synthetic turbulence model and its numerical discretization in terms of the Random Particle-Mesh (RPM) and Fast Random Particle-Mesh (FRPM) method is given. Results are presented for trailing-edge noise, slat noise, and jet noise. Some problems related to the formulation of vortex sound sources are discussed.

Item URL in elib:https://elib.dlr.de/73677/
Document Type:Article
Title:CAA broadband noise prediction for aeroacoustic design
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ewert, Rolandroland.ewert (at) dlr.deUNSPECIFIED
Dierke, Jürgenjuergen.dierke (at) dlr.deUNSPECIFIED
Siebert, Jonajona.siebert (at) dlr.deUNSPECIFIED
Neifeld, Andrejandrej.neifeld (at) dlr.deUNSPECIFIED
Appel, Christinachristina.appel (at) dlr.deUNSPECIFIED
Siefert, MalteUNSPECIFIEDUNSPECIFIED
Kornow, OliverUNSPECIFIEDUNSPECIFIED
Date:12 May 2011
Journal or Publication Title:Journal of Sound and Vibration
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.jsv.2011.04.014
Page Range:pp. 4139-4160
Publisher:Elsevier
ISSN:0022-460X
Status:Published
Keywords:CAA, Random Particle Mesh method, airframe noise, slat noise, trailing edge noise, jet noise
HGF - Research field:Aeronautics, Space and Transport
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: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Ewert, Dr.-Ing. Roland
Deposited On:04 Dec 2012 14:47
Last Modified:13 Mar 2015 11:18

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