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Investigation of engine tones in flight

Siller, H. und Drescher, M. (2011) Investigation of engine tones in flight. 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.

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Kurzfassung

Acoustic fly-over measurements with Boeing 747-400 aircraft have been performed in order to extend an existing noise data base for Airbus A319/20 and MD-11 aircraft with another widely used wide-body aircraft. The data were recorded with a large multi-arm spiral microphone array with 238 microphones which extended over an area of 42 by 35 m. The flight trajectories were determined using a combination of onboard flight recorder and GPS data and an array of laser distance meters on the ground. A linearised trajectory of the aircraft was determined for every fly-over in order to calculate frequency spectra for different emission angles at emission time by compensating the Doppler effect. Sound source maps were calculated using the standard beamforming algorithm and a deconvo- lution method for moving sources. Fly-over measurements were performed with different configurations in order to analyse airframe and engine noise sources separately. In this paper, the main focus is on the analysis of fly-overs with different engine speeds, but also, some results for landing gear noise are presented.

Dokumentart:Konferenzbeitrag (Paper, Poster)
Titel:Investigation of engine tones in flight
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Siller, H.NICHT SPEZIFIZIERT
Drescher, M.NICHT SPEZIFIZIERT
Datum:2011
Erschienen in:Proceedings 17th AIAA / CEAS Aeroacoustics Conference (32nd Aeroacoustics Conference)
Referierte Publikation:Ja
In ISI Web of Science:Nein
Verlag:AIAA
Status:veröffentlicht
Stichwörter:Source localisation, fly-over, Beamforming, microphone array
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
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Turbinentechnologien
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksakustik
Hinterlegt von: Balbir Kaur
Hinterlegt am:20 Jan 2012 14:58
Letzte Änderung:09 Feb 2012 15:43

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