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Leading edge serrations for the reduction of aerofoil separation self-noise
University of Southampton.ORCID iD: 0000-0002-8038-1127
Brunel University.ORCID iD: 0000-0002-7717-0820
University of Southampton.ORCID iD: 0000-0001-5410-4006
University of Southampton.
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2017 (English)Conference paper, Published paper (Other academic)
Abstract [en]

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.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics , 2017.
Series
AIAA AVIATION Forum
National Category
Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-223694DOI: 10.2514/6.2017-4169OAI: oai:DiVA.org:kth-223694DiVA, id: diva2:1186522
Conference
23rd AIAA/CEAS Aeroacoustics Conference, Denver
Note

QC 20180312

Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-06-25Bibliographically approved

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Lacagnina, GiovanniHasheminejad, Seyed MohammadParuchuri, Chaitanya C.Chong, Tze PeiStalnov, Oksana
Aerospace Engineering

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