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A partial accelerating duct over the marine propeller
Citation Link: https://doi.org/10.15480/882.9331
Publikationstyp
Conference Paper
Date Issued
2024-04-04
Sprache
English
Author(s)
Indian Institute of Technology Kharagpur, West Bengal, India, Department of Ocean Engineering and Naval Architecture
Indian Institute of Technology Kharagpur, West Bengal, India, Department of Ocean Engineering and Naval Architecture
TORE-DOI
Start Page
659
End Page
665
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
The hydrodynamic performance of a marine propeller in combination with a partial accelerating duct is investigated. The duct is placed over the upper half of the propeller such that its distance from the blade tip is minimum in the vertical position (0 deg), and gradually increases to a maximum value for the horizontal blade positions (90 deg). The elliptical geometry allows a gradual transition for the propeller blades from the 'ducted condition' in the upper half to the 'open condition' in the lower half over one propeller revolution. CFD investigations are performed at two scales to understand the influence of the duct on the open water characteristics. The effect of duct geometry is studied by varying the axis ratio. Model self-propulsion show 2-3% improvement in the propeller thrust/torque ratio at higher propeller loadings with the partial duct.
Subjects
Marine Propeller
Partial Duct
Open Water Characteristics
Pressure Coefficient
DDC Class
620: Engineering
Publication version
publishedVersion
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Name
Bhattacharyya-APartialAcceleratingDuctOverTheMarinePropeller-1150-1-final.pdf
Type
Main Article
Size
1.43 MB
Format
Adobe PDF