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Installation effects of landing gears

Installation effects of landing gears
Installation effects of landing gears
This paper is concerned with using a high-order linearised Euler solver to calculate the propagation of idealised landing gear noise sources. Two different configurations are considered. One with a flat plate and cavity to simulate wind tunnel tests and the second under a high lift wing. Both cases are considered with mean flow effects. Two different landing gear sources are considered. One is a monopole source at a constant frequency and the other is a time dependent omni-direction source. The origin of the the sources was from a landing gear CFD simulation. The results show how the landing gear sources were modified by the effect of the solid walls and the mean flowfield. The wind tunnel wall
had the installation effect of increasing the levels below the sources. The effect of adding a cavity to the wall was to change the directivity and the levels compared to the case with just a flat wall. Using broadband time domain sources resulted in differences, which led to the conclusion that single frequency sources could potentially over estimate the installation effects. The installation effect of the high lift wing was slightly different directivity and levels compared to the flat wall case.
American Institute of Aeronautics and Astronautics
Angland, David
b86880c6-31fa-452b-ada8-4bbd83cda47f
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Angland, David
b86880c6-31fa-452b-ada8-4bbd83cda47f
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421

Angland, David and Zhang, Xin (2013) Installation effects of landing gears. In AIAA/CEAS Aeroacoustics conference, Berlin, 2013. American Institute of Aeronautics and Astronautics.. (doi:10.2514/6.2013-2138).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper is concerned with using a high-order linearised Euler solver to calculate the propagation of idealised landing gear noise sources. Two different configurations are considered. One with a flat plate and cavity to simulate wind tunnel tests and the second under a high lift wing. Both cases are considered with mean flow effects. Two different landing gear sources are considered. One is a monopole source at a constant frequency and the other is a time dependent omni-direction source. The origin of the the sources was from a landing gear CFD simulation. The results show how the landing gear sources were modified by the effect of the solid walls and the mean flowfield. The wind tunnel wall
had the installation effect of increasing the levels below the sources. The effect of adding a cavity to the wall was to change the directivity and the levels compared to the case with just a flat wall. Using broadband time domain sources resulted in differences, which led to the conclusion that single frequency sources could potentially over estimate the installation effects. The installation effect of the high lift wing was slightly different directivity and levels compared to the flat wall case.

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Published date: 2013
Venue - Dates: 19th AIAA/CEAS Aeroacoustics Conference, , Berlin, Germany, 2013-05-26 - 2013-05-28

Identifiers

Local EPrints ID: 419322
URI: http://eprints.soton.ac.uk/id/eprint/419322
PURE UUID: 49d5e92b-8a6d-4c74-89e4-9e8e68d9f5b4

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Date deposited: 10 Apr 2018 16:30
Last modified: 25 Nov 2021 23:40

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Contributors

Author: David Angland
Author: Xin Zhang

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