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The Challenge of Tonal Fan Noise Prediction for an Aircraft Engine in Flight

Kissner, Carolin Anja and Guerin, Sebastien and Enghardt, Lars and Siller, Henri and Pott-Pollenske, Stephan-Michael (2019) The Challenge of Tonal Fan Noise Prediction for an Aircraft Engine in Flight. Acta acustica united with Acustica, 105 (1), pp. 17-29. Hirtzel. DOI: 10.3813/AAA.919284 ISSN 1610-1928

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Abstract

Expensive fly-over tests are needed to verify that noise certification standards are fulfilled. Currently, no numerical alternative exists to perform a holistic virtual fly-over test. As a step towards enabling such evaluations in the future, the authors focus on an isolated noise source - the tonal rotor-stator-interaction (RSI) of the fan stage. A high-fidelity simulation relying on a state-of-the-art yet computationally efficient method is performed for a V2527 aircraft engine in approach conditions. The computational domain includes the noise generation in the fan stage, its propagation in the engine inlet and bypass duct, as well as its radiation into the far field. Installation effects due to bifurcations and struts in the duct, ESS (engine section stator), liners, and inflow distortions are not considered. Post-processing methods are introduced and applied to the numerical data to allow for a meaningful comparison of the results to microphone data recorded during fly-over experiments. In particular, great care is taken to quantify the numerical dissipation of the simulation inside the nacelle and to enable a suitable correction of the numerical data. The numerical simulation cannot fully reproduce the experimental data indicating that its level of complexity is not yet sufficient. As there is no obvious cause for the mismatch, it would be necessary to incrementally increase the complexity of the simulation in order to pinpoint the most significant sources and effects.

Item URL in elib:https://elib.dlr.de/132270/
Document Type:Article
Title:The Challenge of Tonal Fan Noise Prediction for an Aircraft Engine in Flight
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kissner, Carolin AnjaCarolin.Kissner (at) dlr.dehttps://orcid.org/0000-0003-1094-0939
Guerin, SebastienSebastien.Guerin (at) dlr.deUNSPECIFIED
Enghardt, LarsLars.Enghardt (at) dlr.deUNSPECIFIED
Siller, HenriHenri.Siller (at) dlr.deUNSPECIFIED
Pott-Pollenske, Stephan-MichaelMichael.Pott-Pollenske (at) dlr.deUNSPECIFIED
Date:2019
Journal or Publication Title:Acta acustica united with Acustica
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:105
DOI :10.3813/AAA.919284
Page Range:pp. 17-29
Publisher:Hirtzel
ISSN:1610-1928
Status:Published
Keywords:Fantöne, Überflugmessung
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Virtual Engine and Validation methods
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Kissner, Carolin Anja
Deposited On:09 Dec 2019 09:46
Last Modified:09 Dec 2019 09:46

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