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|Title:||Aerofoil tones produced by a streamlined plate with cavity|
|Citation:||Proceedings of the 18th Australasian Fluid Mechanics Conference, held in Launceston, 3-7 December, 2012 / P.A. Brandner and B.W. Pearce (eds.): pp.1-4|
|Publisher:||Australasian Fluid Mechanics Society|
|Conference Name:||Australasian Fluid Mechanics Conference (18th : 2012 : Launceston, Tasmania)|
|K. Schumacher, C. Doolan and R. Kelso|
|Abstract:||A streamlined plate containing a rectangular cavity on one side was found to produce aerofoil tones. In the considered chord-based Reynolds number range of 1.0 X 105 to 1.8 x 105, cavity oscillation modes did not occur due to insufficient cavity length (being 5% of chord). The discrete tonal frequencies showed good collapse with a U0.085 scaling, suggesting that the tonal mechanism behaves similarly to that reported for smooth aerofoils. In this instance, the results suggest that an aeroacoustic feedback loop exists between the aerofoil trailing edge, where the noise is thought to be generated, and a highly receptive point in the boundary layer located at the cavity trailing edge. A region of separation near the aerofoil trailing edge is also believed to play a role in the amplification of the tones.|
|Rights:||© 18th AFMC. All Rights Reserved|
|Appears in Collections:||Mechanical Engineering conference papers|
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