DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

A new modular fan rig noise test and radial mode detection capability

Tapken, U. und Bauers, R. und Neuhaus, L. und Humphreys, N. und Wilson, A. und Stöhr, Chr. und Beutke, M. (2011) A new modular fan rig noise test and radial mode detection capability. In: Proceedings 17th AIAA / CEAS Aeroacoustics Conference (32nd Aeroacoustics Conference). AIAA. 17th AIAA / CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference), 05.06. - 08.06.2011, Portland, USA.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.


A new major large-scale fan rig test facility, UFFA (Universal Fan Facility for Acoustic), has been designed with the objective to allow test bed changes for engine representative OGVs and bypass duct annulus and liners, for reduced build times, and higher fidelity investigation of aft fan noise technologies. An important enhancement consisted in the implementation of three Radial Mode Detection (RMD) devices in the bypass duct and further downstream in the nozzle equivalent plane. High effort was spend on the realisation of a wall-flush mounted sensor array, which has the advantage not to disturb the flow and the acoustic field. However, the separation of different radial mode contributions is realised only implicitly by the analysis of the axial wave number spectrum, which is particularly challenging if sensors are installed only at the outer duct wall. More robust from the numerical point of view is the established technique to directly measure the radial structure of the sound field with sensor rakes. It is one of the main objectives of this paper to verify whether both techniques deliver the same experimental results also at the high targeted frequencies up to kR=75. As the examination of recently obtained data revealed, the sensor rake measurements were influenced by aerodynamic perturbations originating from the fan rotor wakes. The radial mode analysis could be significantly improved by incorporation of appropriate aerodynamic eigenfunctions. Further investigated was the sensitivity of mode detection with sensor rakes against manufacturing and installation tolerances.

Dokumentart:Konferenzbeitrag (Paper)
Titel:A new modular fan rig noise test and radial mode detection capability
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iD
Humphreys, N.Rolls-Royce plc, Derby, United KingdomNICHT SPEZIFIZIERT
Wilson, A.Rolls-Royce plc, Derby, United KingdomNICHT SPEZIFIZIERT
Stöhr, Chr.Rolls-Royce Deutschland, DahlewitzNICHT SPEZIFIZIERT
Beutke, M.AneCom AeroTest GmbH, WildauNICHT SPEZIFIZIERT
Erschienen in:Proceedings 17th AIAA / CEAS Aeroacoustics Conference (32nd Aeroacoustics Conference)
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Nein
Stichwörter:turbo machinery, fan noise, aeroacoustics, noise source identification, duct acoustics, advanced measurement technique
Veranstaltungstitel:17th AIAA / CEAS Aeroacoustics Conference (32nd AIAA Aeroacoustics Conference)
Veranstaltungsort:Portland, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:05.06. - 08.06.2011
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebe (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Turbinentechnologien (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksakustik
Hinterlegt von: Kaur, Balbir
Hinterlegt am:20 Jan 2012 12:19
Letzte Änderung:09 Feb 2012 15:40

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Hilfe & Kontakt
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2017 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.