The University of Southampton
University of Southampton Institutional Repository

Noise sources control of an aircraft landing gear

Noise sources control of an aircraft landing gear
Noise sources control of an aircraft landing gear
Landing gears are one of the major sources of airframe noise at approach and previous
studies have shown that fairings can be used successfully to reduce broadband noise
radiation in the mid- and high-frequency ranges1. In flight tests2,3, however, the overall
benefit of the fairings was offset by an increase in low frequency broadband noise and a new
tonal noise source that was believed to originate from the leg-door or hinge-door of the gear.
This paper describes an experimental study on a 1/4 scale model of the main landing gear of
the aircraft to control the low-frequency broadband noise and to identify and eliminate the
source of the tone, whilst retaining the noise reduction capability at higher frequencies. The
aeroacoustic and aerodynamic characteristics of the model were assessed in a low-speed
closed-loop wind tunnel using phased microphone arrays on the roof and wall of the tunnel
and surface pressure transducers on the gear. The tone could be readily suppressed or
reduced by a number of different treatments. Control of low frequency noise was less
straightforward, although some preliminary solutions have been identified.
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Smith, Malcolm G.
1bc8608d-0178-4793-8f73-46a6c6b9b279
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Molin, Nicolas
bd3c6c86-bbb5-4de1-87e0-1bbb4ce0fd21
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Smith, Malcolm G.
1bc8608d-0178-4793-8f73-46a6c6b9b279
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Molin, Nicolas
bd3c6c86-bbb5-4de1-87e0-1bbb4ce0fd21

Li, Yong, Smith, Malcolm G., Zhang, Xin and Molin, Nicolas (2007) Noise sources control of an aircraft landing gear. 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), Rome, Italy. 21 - 23 May 2007.

Record type: Conference or Workshop Item (Paper)

Abstract

Landing gears are one of the major sources of airframe noise at approach and previous
studies have shown that fairings can be used successfully to reduce broadband noise
radiation in the mid- and high-frequency ranges1. In flight tests2,3, however, the overall
benefit of the fairings was offset by an increase in low frequency broadband noise and a new
tonal noise source that was believed to originate from the leg-door or hinge-door of the gear.
This paper describes an experimental study on a 1/4 scale model of the main landing gear of
the aircraft to control the low-frequency broadband noise and to identify and eliminate the
source of the tone, whilst retaining the noise reduction capability at higher frequencies. The
aeroacoustic and aerodynamic characteristics of the model were assessed in a low-speed
closed-loop wind tunnel using phased microphone arrays on the roof and wall of the tunnel
and surface pressure transducers on the gear. The tone could be readily suppressed or
reduced by a number of different treatments. Control of low frequency noise was less
straightforward, although some preliminary solutions have been identified.

Full text not available from this repository.

More information

Published date: May 2007
Additional Information: AIAA 2007-3465
Venue - Dates: 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), Rome, Italy, 2007-05-21 - 2007-05-23
Organisations: Aerodynamics & Flight Mechanics

Identifiers

Local EPrints ID: 50420
URI: http://eprints.soton.ac.uk/id/eprint/50420
PURE UUID: a7c1ea89-35b4-47ce-a025-d0ff8f4758a6

Catalogue record

Date deposited: 26 Feb 2008
Last modified: 04 Dec 2018 17:33

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×