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Experimental assessment of low noise landing gear component design

Experimental assessment of low noise landing gear component design
Experimental assessment of low noise landing gear component design
Landing gear related airframe noise is one of the dominant aircraft noise components at
approach, so continued research efforts to reduce landing gear noise are essential. This paper
describes further development of an advanced low noise main landing gear that was previously
designed and tested in the European SILENCER project. The work was carried out under the
current European co-financed TIMPAN project (Technologies to IMProve Airframe Noise) using
a 1/4 scaled landing gear model that was tested in the German-Dutch Wind Tunnel. A variety of
gear configurations were tested including a new side-stay design and various modifications to the
bogie inclination, wheel spacing, bogie fairings with different flow transparency, leg-door
configurations and brake fairings. The farfield noise data from the tests are compared with results
from a landing gear noise prediction model, transposed to full scale flight conditions and
compared with the full scale test data obtained for the original SILENCER advanced A340 style
4-wheel main landing gear. An optimal combination of tested gear modifications led to a further
noise reduction of up to 8 dB(A) in terms of overall A-weighted noise levels relative to the
original advanced gear configuration
1475-472X
763-786
Dobrzynski, Werner
369ca628-a88e-4506-a669-0303efb47b89
Chow, Leung Choi
1b11d5cd-ba9f-4959-a646-b937e430ce62
Smith, Malcolm G.
1bc8608d-0178-4793-8f73-46a6c6b9b279
Boillot, Antoine
83edcb9b-2ca0-4ce2-bb46-a51bf778e01b
Dereure, Olivier
7e2b0f4f-f98e-4172-b2b0-0f0a5256b245
Molin, Nicholas
eeb8837f-9d99-44e0-a71c-ae3af5825fde
Dobrzynski, Werner
369ca628-a88e-4506-a669-0303efb47b89
Chow, Leung Choi
1b11d5cd-ba9f-4959-a646-b937e430ce62
Smith, Malcolm G.
1bc8608d-0178-4793-8f73-46a6c6b9b279
Boillot, Antoine
83edcb9b-2ca0-4ce2-bb46-a51bf778e01b
Dereure, Olivier
7e2b0f4f-f98e-4172-b2b0-0f0a5256b245
Molin, Nicholas
eeb8837f-9d99-44e0-a71c-ae3af5825fde

Dobrzynski, Werner, Chow, Leung Choi, Smith, Malcolm G., Boillot, Antoine, Dereure, Olivier and Molin, Nicholas (2010) Experimental assessment of low noise landing gear component design. International Journal of Aeroacoustics, 9 (6), 763-786. (doi:10.1260/1475-472X.9.6.763).

Record type: Article

Abstract

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

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Published date: July 2010

Identifiers

Local EPrints ID: 190681
URI: http://eprints.soton.ac.uk/id/eprint/190681
ISSN: 1475-472X
PURE UUID: 2de76e23-48c3-4794-b8e0-8628d9b6b652

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Date deposited: 14 Jun 2011 14:22
Last modified: 14 Mar 2024 03:41

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Contributors

Author: Werner Dobrzynski
Author: Leung Choi Chow
Author: Malcolm G. Smith
Author: Antoine Boillot
Author: Olivier Dereure
Author: Nicholas Molin

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