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Airfoil-Turbulence Interaction Noise Source Identification and Reduction by Leading-Edge Serrations

Conference Paper (2019)
Author(s)

G. Bampanis (École Centrale de Lyon)

M. Roger (École Centrale de Lyon)

D. Ragni (TU Delft - Wind Energy)

F. Avallone (TU Delft - Wind Energy)

Christopher Teruna (TU Delft - Wind Energy)

Research Group
Wind Energy
DOI related publication
https://doi.org/10.2514/6.2019-2741
More Info
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Publication Year
2019
Language
English
Research Group
Wind Energy
Bibliographical Note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.@en
ISBN (electronic)
978-1-62410-588-3
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Abstract

The present work is aimed at assessing leading-edge serrations as an airfoil turbulenceimpingement noise (TIN) reduction mean. It relies on extended anechoic wind-tunnel testing including far-field measurements over an observation sphere to infer the three-dimensional features of TIN, and on microphone-array measurements to extract leading-edge noise in frequency. In particular this allows measuring unambiguously reductions of up to 15 dB achieved by serrations on flat plates. A preliminary study of the three-dimensional flow field around the leading edge using time-resolved tomographic particle image velocimetry (PIV) is detailed.

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