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  4. Numerical study on the evolution of vortex structures at the propeller tip and their influence on cavitation inception
 
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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)
Berger, Stephan  orcid-logo
MAN Energy Solutions (MAN-ES), Denmark, Propeller & Aft Ship Department FORCE Technology, Hydro- and Aerodynamics, Kgs. Lyngby, Denmark
Bering, Rasmus Møller  
MAN Energy Solutions, Copenhagen/Frederikshavn, Denmark
Steden, Max  
MAN Energy Solutions (MAN-ES), Denmark
Shin, Keun Woo  
MAN Energy Solutions (MAN-ES), Denmark,
Nielsen, Jens Ring  
MAN Energy Solutions (MAN-ES), Copenhagen/Frederikshavn, Denmark
TORE-DOI
10.15480/882.9347
TORE-URI
https://hdl.handle.net/11420/46484
Start Page
345
End Page
363
Citation
8th International Symposium on Marine Propulsors (smp 2024)
Contribution to Conference
8th International Symposium on Marine Propulsors, smp 2024  
Publisher
Norwegian University of Science and Technology, Department of Marine Technology
ISBN
978-82-691120-5-4
Peer Reviewed
true
Is Part Of
10.15480/882.9294
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
Lizenz
http://rightsstatements.org/vocab/InC/1.0/
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Berger-NumericalStudyOnTheEvolutionOfVortexStructuresAtThePropellerTipA-1167-1-final.pdf

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