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The Simulation Of Slat Noise Applying Stochastic Sound Sources Based On Solenoidal Digital Filters (SDF)

Ewert, Roland (2005) The Simulation Of Slat Noise Applying Stochastic Sound Sources Based On Solenoidal Digital Filters (SDF). Euromech Colloquium 467: Turbulent Flow and Noise Generation, [2005-07-18 - 2005-07-20], Marseille, France.

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Abstract

A new fast and cheap stochastic approach is introduced to model the unsteady turbulent sound sources in the slat-cove of a high-lift airfoil. It is based on the spatial filtering of a random white-noise field and incoporates information about the integral length scale and the turbulent kinetic energy from a steady RANS computation. The stochastic method yields a solenoidal velocity field that is capable to reproduce exactly the well known analytical solution of the second-order two-point correlation tensor in case of homogeneous isotropic turbulence. Results for the sound generation at the slat are given for the underlying RANS mean-flow field being based on a Menter SST turbulence model with Kato-Launder modification. The results for the modeled turbulent flow-field and the radiated acoustic field exhibit physical meaningful characteristics.

Item URL in elib:https://elib.dlr.de/19823/
Document Type:Conference or Workshop Item (Paper)
Title:The Simulation Of Slat Noise Applying Stochastic Sound Sources Based On Solenoidal Digital Filters (SDF)
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ewert, RolandUNSPECIFIEDUNSPECIFIED
Date:July 2005
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CAA, APE, SDF, Slat Noise
Event Title:Euromech Colloquium 467: Turbulent Flow and Noise Generation
Event Location:Marseille, France
Event Type:international Conference
Event Dates:[2005-07-18 - 2005-07-20]
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:05 Dec 2005
Last Modified:31 Jul 2019 19:16

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