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Slat Noise Predictions Based On APE And Stochastic Sound Sources From RANS

Ewert, Roland and Münsch, Manuel (2006) Slat Noise Predictions Based On APE And Stochastic Sound Sources From RANS. In: ICAS 2006. 25th INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES, 2006-09-03 - 2006-09-08, Hamburg, Germany.

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Abstract

Slat Noise simulations are carried out for a high-lift airfoil. A low-cost Computational Aeroacoustics (CAA) approach is applied, which is based on acoustic perturbation equations (APE) in the time-domain that are forced by stochastic sound sources. The newly developed stochastic model is based on the spatial convolution of white-noise and reproduces very accurately target distributions of turbulence kinetic energy and length scales as provided by a steady RANS computation of the turbulent flow problem. The method is applied to simulate spectra and directivities of the slat noise problem. The Mach number scaling law of the broadband slat noise component is evaluated based on three different freestream velocities (M=0.088, 0.118, 0.165). The acoustic benefit of a slat cove cover on broadband sound generation is numerically studied.

Item URL in elib:https://elib.dlr.de/45100/
Document Type:Conference or Workshop Item (Paper)
Title:Slat Noise Predictions Based On APE And Stochastic Sound Sources From RANS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ewert, RolandUNSPECIFIEDUNSPECIFIED
Münsch, ManuelUNSPECIFIEDUNSPECIFIED
Date:2006
Journal or Publication Title:ICAS 2006
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Slat Noise
Event Title:25th INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES
Event Location:Hamburg, Germany
Event Type:international Conference
Event Dates:2006-09-03 - 2006-09-08
Organizer:DGLR
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: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Ewert, Dr.-Ing. Roland
Deposited On:08 Nov 2006
Last Modified:27 Apr 2009 13:10

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