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Numerical study on the evolution of vortex structures at the propeller tip and their influence on cavitation inception
Citation Link: https://doi.org/10.15480/882.9347
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
MAN Energy Solutions (MAN-ES), Denmark, Propeller & Aft Ship Department FORCE Technology, Hydro- and Aerodynamics, Kgs. Lyngby, Denmark
MAN Energy Solutions, Copenhagen/Frederikshavn, Denmark
MAN Energy Solutions (MAN-ES), Denmark
MAN Energy Solutions (MAN-ES), Denmark,
MAN Energy Solutions (MAN-ES), Copenhagen/Frederikshavn, Denmark
TORE-DOI
Start Page
345
End Page
363
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISBN
978-82-691120-5-4
Peer Reviewed
true
In this paper, we study the behaviour of propeller leading edge vortices, local tip vortices and trailing vortices for different operation conditions and tip geometries. It turns out that the pressure drop in the trailing vortex being relevant for cavitation inception strongly depends on the nature of the local tip vortex and of the leading edge vortex. Further, we demonstrate that applying tip rake to a given propeller design is an effective instrument to steer the vorticity distribution in the tip region allowing to increase cavitation inception speed while maintaining the propeller’s efficiency. Open water simulations were carried out using a RANS method and the k-ω SST turbulence closure model with curvature correction. The computational mesh was appropriately refined along the leading edge, the propeller tip and along the axis of the trailing vortex. An intuitive method for evaluating vortex quantities such as circulation, viscous core radius, the level of vorticity and pressure drop at different stations along the vortex axis is presented and applied. Finally, our findings are underpinned by experimental results from a cavitation inception test.
Subjects
Propeller leading edge vortex
propeller tip vortex cavitation inception
vortex detection and analysis
design of silent propellers
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Berger-NumericalStudyOnTheEvolutionOfVortexStructuresAtThePropellerTipA-1167-1-final.pdf
Type
Main Article
Size
48.9 MB
Format
Adobe PDF