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Numerical Jet Noise Prediction for Passive Noise Reduction Means

Neifeld, Andrej and Appel, Christina (2013) Numerical Jet Noise Prediction for Passive Noise Reduction Means. 13th ONERA-DLR Aerospace Symposium, Paris, Frankreich.

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Abstract

Efficient prediction of passive noise reduction means for jet noise was the main objective in the joint research project OPTITHECK. Numerical nozzle design tools for industry require short computational time and must provide enough prediction sensitivity in noise level differences even for small geometry variations. Concerning these demands, a broadband jet noise prediction concept was recently successfully validated. The hybrid approach includes the following parts: Firstly a RANS computation which provides mean flow and statistical turbulence quantities. Secondly, fluctuating modal sound sources derived from the Tam & Auriault cross-correlation model, efficiently obtained from 2-D stochastic realizations using the Random Particle Method (RPM). Thirdly, a Computational Aeroacoustics (CAA) prediction step utilizing the fluctuating sound sources. In this step the near-field solution of jet noise is aquired, which is extrapolated into far-field by the Ffowcs-Williams and Hawkings method to obtain a spectrum that can be compared with far-field measurements.

Item URL in elib:https://elib.dlr.de/82630/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Numerical Jet Noise Prediction for Passive Noise Reduction Means
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Neifeld, Andrejandrej.neifeld (at) dlr.deUNSPECIFIED
Appel, Christinachristina.appel (at) dlr.deUNSPECIFIED
Date:28 May 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:PIANO RPM Jet Noise Reduction
Event Title:13th ONERA-DLR Aerospace Symposium
Event Location:Paris, Frankreich
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Appel, Christina
Deposited On:18 Jun 2013 09:15
Last Modified:18 Jun 2013 09:15

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