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Large eddy simulation of tip vortex interactions for a ducted propulsor
Citation Link: https://doi.org/10.15480/882.9366
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
University of Minnesota, Minneapolis, USA
University of Michigan, Ann Arbor, MI, USA
TORE-DOI
Start Page
581
End Page
588
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
Experiments by Judge et al. (2001); Chesnakas and Jessup (2003); Oweis et al. (2006a) and Oweis et al. (2006b) studied blade-tip vortex interactions of the ducted marine propeller P5407 at an advance ratio J = 0.98 and multiple tip Reynolds numbers. Large-eddy simulation (LES) is used to study these interactions at the same advance ratio and at tip Reynolds number Retip = 1.4×106 . Two vortex structures termed the tip-leakage vortex (TLV) and trailingedge vortex (TEV) whose interactions were closely linked to cavitation inception are studied. The TEV is found to be composed of co- and counter-rotating small-scale vortices and is not coherent enough to be identified by low-pressure regions. Good agreement is obtained with the experiment for mean loads and flow field. The TLV is revealed to interact with the duct wall boundary layer, inducing upstream, secondary, and counter-rotating vortices. The interaction and merger of these vortices with the TLV form a complex flow field with increased unsteadiness and pressure fluctuations past 50% chord length downstream of the blade tip, supporting the experimental observations of their role in cavitation inception.
Subjects
LES
tip vortex
propeller
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Kroll-LargeEddySimulationOfTheTipVortexInteractionForADuctedPropulsor-1194-1-final.pdf
Type
Main Article
Size
4.91 MB
Format
Adobe PDF