Leading edge serrations for the reduction of aerofoil separation self-noise
Leading edge serrations for the reduction of aerofoil separation self-noise
This paper presents an experimental investigation into the use of LE serrations for the reduction of trailing edge self-noise, at least for the NACA-65 aerofoil family. It is shown that the leading edge serrations are able to reduce the self-noise in a low frequency range at small and negative angles of attack. The exact mechanism of this reduction is still not completely discovered, but the LE serrations are discovered able to modulate the mean velocity field and turbulent velocity spectrum in that range of frequencies, as well as to dampen the effect of the angle of attack on the pressure field and to reduce its coherence. We emphasise that this paper represents work in progress and further investigations are still necessary in order to completely understand the dynamics behind this reduction.
American Institute of Aeronautics and Astronautics
Lacagnina, G.
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Hasheminejad, S.M.
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Chaitanya, P.
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Joseph, P.
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Chong, T.P.
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Stalnov, O.
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2017
Lacagnina, G.
b6c548d0-38b3-4f0f-9f0a-9849cb910113
Hasheminejad, S.M.
df18e919-7ad3-431b-8d25-82949e839ac5
Chaitanya, P.
5c1def64-6347-4be3-ac2d-b9f6a314b81d
Joseph, P.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Chong, T.P.
5f980a6b-5e53-4491-9920-c663092ad9e7
Stalnov, O.
6ca7508b-4d32-4e46-9158-ef8f03795ece
Lacagnina, G., Hasheminejad, S.M., Chaitanya, P., Joseph, P., Chong, T.P. and Stalnov, O.
(2017)
Leading edge serrations for the reduction of aerofoil separation self-noise.
In 23rd AIAA/CEAS Aeroacoustics Conference, 2017.
American Institute of Aeronautics and Astronautics..
Record type:
Conference or Workshop Item
(Paper)
Abstract
This paper presents an experimental investigation into the use of LE serrations for the reduction of trailing edge self-noise, at least for the NACA-65 aerofoil family. It is shown that the leading edge serrations are able to reduce the self-noise in a low frequency range at small and negative angles of attack. The exact mechanism of this reduction is still not completely discovered, but the LE serrations are discovered able to modulate the mean velocity field and turbulent velocity spectrum in that range of frequencies, as well as to dampen the effect of the angle of attack on the pressure field and to reduce its coherence. We emphasise that this paper represents work in progress and further investigations are still necessary in order to completely understand the dynamics behind this reduction.
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Published date: 2017
Venue - Dates:
23rd AIAA/CEAS Aeroacoustics Conference, 2017, , Denver, United States, 2017-06-05 - 2017-06-09
Identifiers
Local EPrints ID: 419803
URI: http://eprints.soton.ac.uk/id/eprint/419803
PURE UUID: 04307128-2cd8-4ea9-9592-3963cd74d78b
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Date deposited: 20 Apr 2018 16:30
Last modified: 17 Mar 2024 12:01
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Contributors
Author:
G. Lacagnina
Author:
S.M. Hasheminejad
Author:
T.P. Chong
Author:
O. Stalnov
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