| Abstract | This paper describes an overview of model tests and numerical predictions for a podded propulsor in ice. The objectives of the model tests are to understand the propeller-ice interaction phenomena and to investigate propeller performance in iced conditions. An azimuthing podded propulsor was used and the tests were designed for continuous milling conditions. 60 mm thickness ice sheets were prepared for the various test conditions; 2 depths of cut, 5 azimuthing angles, and 4-5 advance coefficients. Ice loads were measured at various positions on the model such as the top of the unit (6 load cells), propeller shaft (2 six-component dynamometers and 1 torque gauge) and one of the propeller blades (1 six-component dynamometer). For numerical calculation, the 3-dimensional unsteady panel method (PMARC) was used as the starting point. Based on the ice physics and kinematics of propeller ice interaction, empirical formulae were suggested and implemented into the panel code. Both numerical and experimental results are presented and discussed. |
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