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Experimental assessment of low noise landing gear component design

By Werner Dobrzynski, Leung Choi Chow, Malcolm G. Smith, Antoine Boillot, Olivier Dereure and Nicholas Molin

Abstract

Landing gear related airframe noise is one of the dominant aircraft noise components at<br/>approach, so continued research efforts to reduce landing gear noise are essential. This paper<br/>describes further development of an advanced low noise main landing gear that was previously<br/>designed and tested in the European SILENCER project. The work was carried out under the<br/>current European co-financed TIMPAN project (Technologies to IMProve Airframe Noise) using<br/>a 1/4 scaled landing gear model that was tested in the German-Dutch Wind Tunnel. A variety of<br/>gear configurations were tested including a new side-stay design and various modifications to the<br/>bogie inclination, wheel spacing, bogie fairings with different flow transparency, leg-door<br/>configurations and brake fairings. The farfield noise data from the tests are compared with results<br/>from a landing gear noise prediction model, transposed to full scale flight conditions and<br/>compared with the full scale test data obtained for the original SILENCER advanced A340 style<br/>4-wheel main landing gear. An optimal combination of tested gear modifications led to a further<br/>noise reduction of up to 8 dB(A) in terms of overall A-weighted noise levels relative to the<br/>original advanced gear configuratio

Topics: TL
Year: 2010
OAI identifier: oai:eprints.soton.ac.uk:190681
Provided by: e-Prints Soton
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