Development of a time domain prediction method for hull pressure fluctuation induced by marine propeller sheet cavitation with consideration of scattering effects

Using a time domain acoustic analogy, we develop a method to predict the sound field and hull pressure fluctuation generated by unsteady sheet cavitation on marine propellers. Formulation 1A of Farassat is introduced to enhance theoretical understanding of this work, and it is applied to modeling th...

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Bibliographic Details
Published in:Journal of marine science and technology 2012-09, Vol.17 (3), p.276-290
Main Authors: Kim, Jong-Do, Hong, Suk-Yoon, Song, Jee-Hun
Format: Article
Language:English
Subjects:
Acoustics
Analysis
Automotive Engineering
Cavitation
Engineering
Engineering Design
Engineering Fluid Dynamics
Fluctuation
Marine
Marine machinery
Mathematical models
Mechanical Engineering
Methods
Offshore Engineering
Original Article
Predictive control
Propellers
Scattering
Sound fields
Time domain
Wind
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Summary:Using a time domain acoustic analogy, we develop a method to predict the sound field and hull pressure fluctuation generated by unsteady sheet cavitation on marine propellers. Formulation 1A of Farassat is introduced to enhance theoretical understanding of this work, and it is applied to modeling the scattered sound field created by the fuselage boundary. To express the direct sound field resulting from sheet cavitation, a new solution is studied which considers the Doppler effect and also separately expresses the near and far fields. A small cube model is used to verify the method. Computed acoustic field pressures around the cube are compared with the boundary element method, and the numerical results show good agreement. Finally, the pressure fluctuation on a ship stern model is calculated.
ISSN:0948-4280
1437-8213
DOI:10.1007/s00773-012-0173-2