An analytically-based method for predicting the noise generated by the interaction between turbulence and a serrated leading edge
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Publication Date
2018-05-26Journal Title
Journal of Sound and Vibration
ISSN
0022-460X
Publisher
Elsevier
Volume
422
Pages
506-525
Type
Article
This Version
AM
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Mathews, J., & Peake, N. (2018). An analytically-based method for predicting the noise generated by the interaction between turbulence and a serrated leading edge. Journal of Sound and Vibration, 422 506-525. https://doi.org/10.1016/j.jsv.2018.02.024
Abstract
This paper considers the interaction of turbulence with a serrated leading edge. We investigate the noise
produced by an aerofoil moving through a turbulent perturbation to uniform flow by considering the scattered
pressure from the leading edge. We model the aerofoil as an infinite half plane with a leading edge serration,
and develop an analytical model using a Green’s function based upon the work of Howe. This allows us
to consider both deterministic eddies and synthetic turbulence interacting with the leading edge. We show
that it is possible to reduce the noise by using a serrated leading edge compared with a straight edge, but
the optimal noise-reducing choice of serration is hard to predict due to the complex interaction. We also
consider the effect of angle of attack, and find that in general the serrations are less effective at higher angles
of attack.
Sponsorship
EPSRC (EP/H023348/1)
Identifiers
External DOI: https://doi.org/10.1016/j.jsv.2018.02.024
This record's URL: https://www.repository.cam.ac.uk/handle/1810/275680
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