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CAA Broadband Noise Prediction for Aeroacoustic Design

Ewert, Roland and Dierke, Jürgen and Neifeld, Andrej and Appel, Christina and Siefert, Malte and Kornow, Oliver (2010) CAA Broadband Noise Prediction for Aeroacoustic Design. In: Procedia IUTAM, Volume, pp. 254-263. Elsevier. IUTAM Symposium on Computational Aero-Acoustics for Aircraft Noise Prediction, 29.-31. Mar. 2010, Southampton, UK. ISSN 2210-9838

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Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/724870/description#description

Abstract

The current status of a hybrid RANS/CAA approach for the simulation of broadband sound generation is presented. The method rests on the use of steady Reynolds Averaged Navier-Stokes (RANS) simulation to prescribe the time-averaged motion of turbulent flow. By means of synthetic turbulence the steady one-point statistics (e.g. turbulent kinetic energy) and turbulent length- and time-scales of RANS are translated into fluctuations of turbulent velocity (or vorticity), whose statistics very accurately reproduce the spatial target distributions of RANS. The synthetic fluctuations are used to prescribe sound sources which drive linear acoustic perturbation equations. The whole approach represents a methodology to solve statistical noise theories with state-of-the-art Computational Aeroacoustics (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, slat, jet, and combustion noise. Some problems related to the formulation of vortex sound sources are discussed.

Item URL in elib:https://elib.dlr.de/68334/
Document Type:Conference or Workshop Item (Speech, Paper)
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
Neifeld, Andrejandrej.neifel (at) dlr.deUNSPECIFIED
Appel, Christinachristina.appel (at) dlr.deUNSPECIFIED
Siefert, Maltemalte.siefert (at) dlr.deUNSPECIFIED
Kornow, Oliveroliver.kornow (at) dlr.deUNSPECIFIED
Date:2010
Journal or Publication Title:Procedia IUTAM
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Volume
Page Range:pp. 254-263
Publisher:Elsevier
Series Name:Procedia IUTAM
ISSN:2210-9838
Status:Published
Keywords:CAA, RPM, Airfram Noise, Slat Noise, Trailing Edge Noise, Jet Noise, Combustion Noise
Event Title:IUTAM Symposium on Computational Aero-Acoustics for Aircraft Noise Prediction
Event Location:Southampton, UK
Event Type:Workshop
Event Dates:29.-31. Mar. 2010
Organizer:Institut of Sound and Vibration, University of Southampton
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:18 Jan 2011 10:09
Last Modified:12 Dec 2013 21:12

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