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A Study on Landing Gear Wake Flap Interaction Noise

Pott-Pollenske, Michael und Almoneit, Daniela und Saueressig, G. (2017) A Study on Landing Gear Wake Flap Interaction Noise. 23rd AIAA/CEAS Aeroacoustics Conference, 2017-06-05 - 2017-06-09, Denver, CO, USA. doi: 10.2514/6.2017-3692.

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Kurzfassung

Landing gear noise represents for nearly all transport aircraft one, if not the dominant, airframe noise source during the final landing phase of the aircraft. This can be roughly defined to start at about 2000 ft altitude above ground level and ends with the aircraft’s touch down. Accordingly, landing gear noise is a significant contributor to both, the certification noise level as well as community noise levels. Past and current research activities on landing gear noise focused at a first glance on the noise generated due to the interaction between a turbulent flow and the landing gear structure such as wheels and brakes, struts, links and dressings. Less emphasis was spent on the fact that the main landing gear related wake impinges on the flap and thus could generate landing gear wake – flap interaction noise. The aim of the present study was to identify and quantify gear wake flap interaction noise. The study is based on flyover noise measurement data gathered in 2004 in the mainframe of the German national funded research project FREQUENZ. Noise tests were conducted with an Airbus A319 100 aircraft which can be considered representative for the fleet of narrow body short and medium range aircraft. The obtained results can be summarized as follows: gear wake flap interaction noise increases the airframe noise signature by up to 3 dB at medium frequencies and is most pronounced for forward and rear arc radiation directions. High as well as very low frequency noise levels are not significantly contributing to gear wake - flap interaction noise. For future attempts to reduce airframe noise and in particular landing gear noise gear wake flap interaction noise needs to be considered.

elib-URL des Eintrags:https://elib.dlr.de/116751/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:A Study on Landing Gear Wake Flap Interaction Noise
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Pott-Pollenske, Michaelmichael.pott-pollenske (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Almoneit, Danieladaniela.almoneit (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Saueressig, G.deutsche lufthansa, frankfurt/mainNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:6 Juni 2017
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.2514/6.2017-3692
Status:veröffentlicht
Stichwörter:Airframe Noise, Landing Gear Noise, Interaction Noise
Veranstaltungstitel:23rd AIAA/CEAS Aeroacoustics Conference
Veranstaltungsort:Denver, CO, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:5 Juni 2017
Veranstaltungsende:9 Juni 2017
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Technische Akustik
Hinterlegt von: Pott-Pollenske, Stephan-Michael
Hinterlegt am:13 Dez 2017 10:38
Letzte Änderung:24 Apr 2024 20:21

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