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/ | |||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | |||||||||||||||||||||
Title: | CAA Broadband Noise Prediction for Aeroacoustic Design | |||||||||||||||||||||
Authors: |
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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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