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Dynamic positioning thruster near wake hydrodynamic characteristics at near bollard pull

Lookup NU author(s): Professor Pengfei LiuORCiD


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The knowledge of the hydrodynamic characteristics and momentum effects of the flow of dynamic positioning (DP) thrusters are important factors in the design of structures around the DP thrusters and in improving DP system reliability. In the present study, the flow field around a DP thruster model was precisely measured in a cavitation tunnel using a two-component laser Doppler velocimetry (LDV) system. These experiments were carried out with and without a nozzle at three different axial planes up to 1.5 diameters downstream, and the results are presented here for a pitch/diameter ratio of 1.2 at near bollard pull operating conditions (J = 0.4 and J = 0.45). This paper shows and compares the results of the DP thruster near wake hydrodynamic and momentum characteristics when operating with and without a nozzle at two different low advance coefficient values.

Publication metadata

Author(s): El Lababidy SA, Bose N, Liu P, Walker D

Publication type: Article

Publication status: Published

Journal: Journal of Ship Research

Year: 2009

Volume: 53

Issue: 1

Pages: 48-58

Print publication date: 01/03/2009

ISSN (print): 0022-4502

ISSN (electronic): 1542-0604

Publisher: Society of Naval Architects and Marine Engineers