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Open water performance of two different ducted propellers in oblique flow
Citation Link: https://doi.org/10.15480/882.9341
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
Chalmers University of Technology, Sweden
Chalmers University of Technology, Gothenburg, Sweden
Chalmers University of Technology, Gothenburg, Sweden
TORE-DOI
Start Page
667
End Page
675
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
Ducted marine propellers provide increased efficiency, enhanced maneuverability, improved thrust, and reduced cavitation and noise in certain operating conditions. Ducted propellers may also offer advantages over propellers without a duct in waves. The duct surrounding the propeller can help minimize the effects of wave impact and reduce the blade loading variation as well as the risk of cavitation. This can result in improved propulsion efficiency and reduced vibration and noise levels. Additionally, the enhanced thrust generated by ducted propellers can provide better maneuverability and control in rough seas. However, there is limited documented evidence for the evaluation of the performance of ducted propellers in waves. To this end, this paper’s objective is to investigate the effect of ducts on the performance of marine propulsors in waves relative to calm water. Besides a conventional duct design, a special duct geometry that consists of a wavy leading edge is also studied. These investigations are carried out in open water through Computational Fluid Dynamics (CFD). A Kaplan series propeller, KA4–55, and the benchmark 19A-duct are used. The effect of waves on propeller performance is simplified by running the simulations in oblique flow conditions. It has been obtained that in oblique flow, with 19A duct, the propulsive performance increased with increasing angle of flow. Results have demonstrated that incorporating LET ducts can enhance duct thrust performance in straight flow conditions, even without any inclination.
Subjects
Ducted Propeller
Wavy Leading Edge
Waves
Oblique Flow
CFD
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Donyavizadeh-OpenWaterPerformanceOfTwoDifferentDuctedPropellersInObliqueFlow-1161-1-final.pdf
Type
Main Article
Size
2.05 MB
Format
Adobe PDF