Some unsteady propulsive characteristics of a podded propeller unit under maneuvering operation

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Proceedings titleProceedings of the First International Symposium on Marine Propulsors - smp’09
Conference1st International Symposium on Marine Propulsors, June 22-24, 2009, Trondheim, Norway
Pages507516; # of pages: 10
SubjectPodded propulsor; Propulsor Simulator; Propeller unsteady loads; Panel Methods
AbstractPropulsion dynamics of a podded propulsor unit in steering motion at fixed azimuth angles were investigated numerically. Unsteady forces, torques and bending moments were predicted for a model podded propulsor unit at various azimuth angles. Analysis was performed for averaged forces and their fluctuations as well. A timedomain unsteady multi-body panel method code, PROPELLA, was further developed for this work. Predictions were compared with a set of time averaged inhouse experimental data for a puller type podded propulsor configuration in the first quadrant operation. Unsteady fluctuations of forces were predicted numerically. Analysis was made for the bending moment on propeller blades, shaft and the propulsor unit stock shaft for azimuth angles from 0 to 45 degrees. It indicates that the magnitude and fluctuation of the forces are significant and they are essential for structural strength and design optimization. The predicted bending moment and global forces on the propulsor unit provide some useful data for ship maneuvering motion and simulation at off design conditions.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NPARC number18254622
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Record identifier0f55bbe8-c220-4511-9a6e-ab435a50cfdf
Record created2011-07-13
Record modified2016-05-09
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