This paper presents the results of an experimental study on the effects of propeller hub angle and azimuth conditions on the propulsive characteristics of puller podded propulsors in open water conditions. The propulsive performance of two model puller-podded units with different propeller hub geometry was measured using a custom-designed pod dynamometer in a towing tank. The podded units were tested to measure the thrust and torque of the propeller and the forces on the whole unit in three orthogonal directions. The tests were conducted for a range of advance coefficients from 0 to 1.2, combined with the range of static azimuth angles from +20° to -20° with a 10° increment. The dynamometer system consisted of a six-component global dynamometer and a three-component pod dynamometer. The variation in the propulsive pe1formance due to the changes in hub geometry was examined first, followed by a study on the effect of azimuth conditions on the forces and moments on the propulsor. The force and moment measurements are presented as functions of advance coefficient and azimuth angle. The results showed that for the range of azimuth angles tested, the thrust and torque of the propeller and the forces on the whole unit in three orthogonal directions are functions of the azimuth angle for puller propulsors.
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SNAME 11th Propeller and Shafting Symposium
September 12–13, 2006
Williamsburg, Virginia, USA
Study of Puller Podded Propulsors with Tapered Hub Propellers in Straight Course and Azimuthing Conditions
Mohammed Fakhrul Islam;
Mohammed Fakhrul Islam
Memorial University of Newfoundland
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Brian Veitch;
Brian Veitch
Memorial University of Newfoundland
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Pengfei Liu
Pengfei Liu
Institute for Ocean Technology
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Paper presented at the SNAME 11th Propeller and Shafting Symposium, Williamsburg, Virginia, USA, September 2006.
Paper Number:
SNAME-PSS-2006-09
Published:
September 12 2006
Citation
Islam, Mohammed Fakhrul, Veitch, Brian, Bose, Neil, and Pengfei Liu. "Study of Puller Podded Propulsors with Tapered Hub Propellers in Straight Course and Azimuthing Conditions." Paper presented at the SNAME 11th Propeller and Shafting Symposium, Williamsburg, Virginia, USA, September 2006. doi: https://doi.org/10.5957/PSS-2006-09
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