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Aeroacoustics research in Europe: The CEAS-ASC report on 2017 highlights, Contribution: Uncertainty assessment of a parametric aircraft system noise prediction

Schäffer, Beat and Bertsch, Lothar and Guerin, Sebastien (2019) Aeroacoustics research in Europe: The CEAS-ASC report on 2017 highlights, Contribution: Uncertainty assessment of a parametric aircraft system noise prediction. Journal of Sound and Vibration, 450, pp. 175-198. Elsevier. DOI: 10.1016/j.jsv.2019.03.006 ISSN 0022-460X

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Official URL: https://doi.org/10.1016/j.jsv.2019.03.006

Abstract

Short review of DLR and TU Empa reserach activities toward uncertainty assessment of aircraft noise predictions. A new approach to assess uncertainties associated with the predicted noise levels was introduced in previous publications. The overall uncertainty is thereby comprised of input data, noise modelling, and sound propagation uncertainties. Obviously, each modeled noise source is associated with different input data and modelling uncertainties. According to the constantly changing noise source ranking along typical flight procedures, the overall uncertainty of the predicted ground noise level is highly variable. The new approach is applied to a DLR simulation process to establish a quality assessment and enable a reliable system noise prediction. It is demonstrated how the prediction results are affected by the underlying and prevailing uncertainty. Noise isocontour areas are subject to significant variations when uncertainties are introduced. Uncertainty analysis reveals that uncertainty associated with input data and propagation effects can even exceed the uncertainties of the noise source models when simulating conventional vehicles. The established uncertainty assessment can readily by applied to conventional tube-and-wing vehicles with turbofan engines.

Item URL in elib:https://elib.dlr.de/126889/
Document Type:Article
Title:Aeroacoustics research in Europe: The CEAS-ASC report on 2017 highlights, Contribution: Uncertainty assessment of a parametric aircraft system noise prediction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schäffer, BeatEMPA/CH-Abt. LärmbekämpfungUNSPECIFIED
Bertsch, LotharLothar.Bertsch (at) dlr.dehttps://orcid.org/0000-0003-2780-2858
Guerin, SebastienSebastien.Guerin (at) dlr.deUNSPECIFIED
Date:14 March 2019
Journal or Publication Title:Journal of Sound and Vibration
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:450
DOI :10.1016/j.jsv.2019.03.006
Page Range:pp. 175-198
Editors:
EditorsEmail
Enghardt, Larslars.enghardt@dlr.de
Publisher:Elsevier
Series Name:Aeroacoustics research in Europe: The CEAS-ASC report on 2017 highlights
ISSN:0022-460X
Status:Published
Keywords:uncertainty, aircraft noise prediction, PANAM
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Berlin-Charlottenburg , Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Institute of Propulsion Technology > Engine Acoustic
Deposited By: Winkels, Elisabeth
Deposited On:03 Apr 2019 14:02
Last Modified:08 Apr 2019 03:40

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