Outlook on marine propeller noise and cavitation modelling
Outlook on marine propeller noise and cavitation modelling
Two computational studies are presented in this paper. First, the Potsdam Propeller Test Case which is used to demonstrate the capabilities of mass transfer cavitation models, more precisely the model by Sauer and Schnerr, in tackling the problem of marine propeller cavitation. It is shown that the extents of the predicted cavitation regions agree well with the experiment but suffer from the fact that the tip vortices and the associated low pressure regions are under resolved when URANS is utilised. Next, preliminary results from the study of cavitation noise modelling attempt are presented for a NACA 0009 section, used as a simplified representation of a propeller blade. Large Eddy Simulation and Ffowcs Williams-Hawkings porous acoustic analogy are used in order to estimate the cavitation-induced noise. Results indicate that the discussed approach provides the means for identifying low-frequency noise generation mechanisms in the flow, yielding sound pressure levels of the order of 40 dB re 20 mPa, but does not allow for fine-scale bubble dynamics to be resolved. One may conclude that the discussed approach is a viable option to predict large parts of marine propeller noise spectra but further work is needed in order to account for the high frequency components.
cavitation, noise, large eddy simulation, propeller, acoustic analogy
101-108
Lidtke, Artur Konrad
5570c46b-09b5-4345-9f5c-7a5ed2a29ffc
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
November 2014
Lidtke, Artur Konrad
5570c46b-09b5-4345-9f5c-7a5ed2a29ffc
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Humphrey, Victor F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Lidtke, Artur Konrad, Turnock, Stephen R. and Humphrey, Victor F.
(2014)
Outlook on marine propeller noise and cavitation modelling.
In A. Yücel Odabaşı Colloquium Series: 1 st International Meeting - Propeller Noise & Vibration.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Two computational studies are presented in this paper. First, the Potsdam Propeller Test Case which is used to demonstrate the capabilities of mass transfer cavitation models, more precisely the model by Sauer and Schnerr, in tackling the problem of marine propeller cavitation. It is shown that the extents of the predicted cavitation regions agree well with the experiment but suffer from the fact that the tip vortices and the associated low pressure regions are under resolved when URANS is utilised. Next, preliminary results from the study of cavitation noise modelling attempt are presented for a NACA 0009 section, used as a simplified representation of a propeller blade. Large Eddy Simulation and Ffowcs Williams-Hawkings porous acoustic analogy are used in order to estimate the cavitation-induced noise. Results indicate that the discussed approach provides the means for identifying low-frequency noise generation mechanisms in the flow, yielding sound pressure levels of the order of 40 dB re 20 mPa, but does not allow for fine-scale bubble dynamics to be resolved. One may conclude that the discussed approach is a viable option to predict large parts of marine propeller noise spectra but further work is needed in order to account for the high frequency components.
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Published date: November 2014
Keywords:
cavitation, noise, large eddy simulation, propeller, acoustic analogy
Organisations:
Fluid Structure Interactions Group, Faculty of Engineering and the Environment
Identifiers
Local EPrints ID: 385639
URI: http://eprints.soton.ac.uk/id/eprint/385639
PURE UUID: 6f0a6a1f-7bda-4c80-adc7-6b0576a74f16
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Date deposited: 21 Jan 2016 09:04
Last modified: 16 Mar 2024 03:34
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