Ewert, Roland (2006) Broadband Slat Noise Prediction Based on CAA and Stochastic Sound Sources from a Fast Random Particle-Mesh (RPM) Method. Computers & Fluids (37), pp. 369-387. Elsevier Science.
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Abstract
The present paper studies the application of a low-cost CAA approach to a slat noise problem. 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 convolution of white-noise with a filter kernel and is capable to reproduce target distributions of turbulent kinetic energy and length scales, e.g., provided by a steady RANS solution to the turbulent flow problem. The computational method yields a perfectly solenoidal velocity field that resolves for homogeneous isotropic turbulence exactly the complete second-order two-point velocity correlation tensor. 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 and without Kato-Launder modification, respectively. Physical meaningful results are obtained for the acoustic characteristics of the slat-noise problem.
Item URL in elib: | https://elib.dlr.de/45113/ | ||||||||
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Document Type: | Article | ||||||||
Title: | Broadband Slat Noise Prediction Based on CAA and Stochastic Sound Sources from a Fast Random Particle-Mesh (RPM) Method | ||||||||
Authors: |
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Date: | 2006 | ||||||||
Journal or Publication Title: | Computers & Fluids | ||||||||
Refereed publication: | Yes | ||||||||
Open Access: | No | ||||||||
Gold Open Access: | No | ||||||||
In SCOPUS: | No | ||||||||
In ISI Web of Science: | Yes | ||||||||
Page Range: | pp. 369-387 | ||||||||
Publisher: | Elsevier Science | ||||||||
Status: | Published | ||||||||
Keywords: | Aeroacoustics, Turbulent Sound Sources, Particle-Mesh method, Homogeneous Isotropic Turbulence | ||||||||
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: | 15 Dec 2008 | ||||||||
Last Modified: | 14 Jan 2010 23:36 |
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