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Noise from sub-boundary layer steps


Doolan, CJ and Moreau, DJ and Brandner, PA and Pearce, BW and De Graaf, KL, Noise from sub-boundary layer steps, Proceedings of the 19th Australasian Fluid Mechanics Conference, 8-11 December, Melbourne, Australia, pp. 1-4. ISBN 978-0-646-59695-2 (2014) [Refereed Conference Paper]


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Copyright 2014 Australasian Fluids Mechanics Society

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Flow-induced noise data has been obtained under a wide range of conditions for a forward-backward sub-boundary layer steppair, using both hydroacoustic and aeroacoustic experimental facilities. The unscaled noise data show that sound generation behaves similarly in air and water. A non-dimensional analysis was used to develop scaling laws of the noise generation process. Appropriate scaling shows the results from each facility collapse when the wavelength of sound is approximately lower than the dimensions of the hydroacoustic facility test section. Noise was found to radiate in both cross-stream and streamwise directions, thus suggesting that a new noise generation model is required for these types of steps. Noise scaled with velocity raised to a power of seven, in agreement with previous forward facing sub-boundary layer step experiments.

Item Details

Item Type:Refereed Conference Paper
Keywords:boundary layer, steps, noise, experimental measurement, hydroacoustics
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Manufacturing
Objective Group:Transport equipment
Objective Field:Nautical equipment
UTAS Author:Brandner, PA (Professor Paul Brandner)
UTAS Author:Pearce, BW (Dr Bryce Pearce)
UTAS Author:De Graaf, KL (Dr Katrina De Graaf)
ID Code:98263
Year Published:2014
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2015-02-09
Last Modified:2018-04-05
Downloads:118 View Download Statistics

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