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Numerical investigation of unsteady pitching foil cavitation
Citation Link: https://doi.org/10.15480/882.9358
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
University of Iowa, Iowa City, Iowa, USA
University of Iowa, Iowa City, Iowa, USA
IIHR—Hydroscience & Engineering, The University of Iowa, Iowa City, Iowa, USA
TORE-DOI
Start Page
9
End Page
15
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISSN
2414-6129
ISBN
978-82-691120-5-4
Peer Reviewed
true
In the present study, numerical simulations of the unsteady cavitation flows around a pitching foil are performed with a focus on the effects of the pitching motion on the cavity behavior and forces. Sinusoidal pitching motions are imposed to the foil with the reduced frequencies and amplitude in the same range of most practical propeller applications. It has been found that the maximum cavity length decreases with the reduced frequency first and then increases, which is in good agreement with the experimental observations. The simulation results show that the cavity is very unstable at low oscillating frequencies and tends to be stable at high frequencies. The force exhibits the same oscillating frequency and phase as the angle of attack. The amplitude of the lift increases with the frequency, and the mean value of the lift decreases with the frequency first and then increases. The numerical issues and challenges of the simulations of the forced unsteady cavitation flows are addressed. Future work will be focused on scale resolved turbulence and more advanced cavitation models.
Subjects
Unsteady cavitation
pitching foil
oscillation
CFD
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Wang-NumericalInvestigationOfUnsteadyPitchingFoilCavitation-1183-1-final.pdf
Type
Main Article
Size
1.38 MB
Format
Adobe PDF