Prediction of transient loading on a propeller from an approaching ice block

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TypeArticle
Conference8th International Symposium on Practical Design of Ships and Other Floating Structures, 16-21 September 2001, Shanghai, China
SubjectMarine Propulsion; Panal Methods; Unsteady Loading; Ice-Propeller Interaction
AbstractAn unsteady 3D surface panel method has been developed to predict hydrodynamic load fluctuations on an ice class propeller induced by continuous variation of proximity to an ice block. The low order, time domain, combined doublet and source panel method approximates the doublet and source distribution uniformly over each panel on the propeller blades. For non-lifting bodies, i.e., the hub and ice block, only sources are distributed over the body surfaces. The simulations model is contrived in such a manner that the ice block and surrounding fluid remain stationary; and at each time step, the propeller rotates and advances forward in the inertial reference frame. This numerical model is validated with previous fixed-proximity experimental measurements and good agreement is obtained. Prediction of the fluctuating hydrodynamic load is carried out as a full dynamic interaction between the ice block and the propeller. Results for this study are compared with previous fixed-proximity numerical models and experiments. The new dynamic model establishes a basis for analysis of a more realistic fluid-structure interaction, which could, in the future, include ice block acceleration due to suction force and ice block impact loading on the propeller blade and shaft.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
IdentifierIR-2001-42
NRC number6367
NPARC number8894958
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Record identifier459ef328-2dab-4b05-8c53-ae95d259e16b
Record created2009-04-22
Record modified2016-05-09
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