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Experimental assessment of low noise landing gear component design

Dobrzynski, Werner and Chow, Leung Choi and Smith, Malcolm and Boillot, Antoine and Dereure, Olivier and Molin, Nicolas (2009) Experimental assessment of low noise landing gear component design. 15th AIAA/CEAS Aeroacoustics Conference, 11.-13. May 2009, Miami, USA.

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Abstract

Landing gear related airframe noise is one of the dominant aircraft noise components at approach. It therefore is essential to particularly reduce landing gear noise. In the European SILENCER project, advanced low noise gears had been designed and tested at full scale. In the current European co-financed project TIMPAN (Technologies to IMProve Airframe Noise) still more advanced low noise design concepts were investigated and noise tested on a ¼ scaled main landing gear model in the German-Dutch Wind Tunnel. A variety of gear configurations were tested including a new side-stay design, different modifications of bogie inclination, wheel spacing, bogie fairings with different flow transparency, leg-door configu-rations and brake fairings. The acquired farfield noise data are compared against the results from a landing gear noise prediction model, transposed to full scale flight conditions and compared against the full scale test data obtained for the SILENCER advanced A340 style 4-wheel main landing gear. An optimal combination of tested gear modifications led to a noise reduction of up to 8 dB(A) in terms of overall A-weighted noise levels relative to the SILENCER reference gear configuration.

Item URL in elib:https://elib.dlr.de/63146/
Document Type:Conference or Workshop Item (Paper)
Title:Experimental assessment of low noise landing gear component design
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dobrzynski, Wernerwerner.dobrzynski (at) dlr.deUNSPECIFIED
Chow, Leung ChoiUNSPECIFIEDUNSPECIFIED
Smith, MalcolmUNSPECIFIEDUNSPECIFIED
Boillot, AntoineUNSPECIFIEDUNSPECIFIED
Dereure, OlivierUNSPECIFIEDUNSPECIFIED
Molin, NicolasUNSPECIFIEDUNSPECIFIED
Date:May 2009
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:Airframe noise, landing gear noise, low noise gear design
Event Title:15th AIAA/CEAS Aeroacoustics Conference
Event Location:Miami, USA
Event Type:international Conference
Event Dates:11.-13. May 2009
Organizer:AIAA/CEAS
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Dobrzynski, Dr.-Ing. Werner
Deposited On:12 Feb 2010 12:45
Last Modified:31 Jul 2019 19:27

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