Experimental analysis of the wake from a dynamic positioning thruster

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Conference25th Symposium on Naval Hydrodynamics, 8-13 August, St. John's, NL
SubjectStereo Particle Image Velocimetry (SPIV); INSEAN cavitation tunnel
AbstractThe knowledge of the effects of the wakes from Dynamic Positioning (DP) thrusters and the practical need to describe and predict their impact is fundamental in the assessment of design loading on slipstream-submerged equipment associated with offshore floating systems. In particular, with the increasing importance and application of DP thrusters in the offshore industry, the designer as well as the operator must have more information about the momentum in the wake from the thruster. This paper presents wake measurements from cavitation tunnel tests carried out on a ducted propeller model at the Italian Ship Model Basin (INSEAN), Rome, Italy. Through these experiments, DP thruster wake velocity components at different downstream axial planes were obtained experimentally using a Stereo Particle Image Velocimetry (SPIV) system in the INSEAN cavitation tunnel, up to 15 diameters downstream. These experiments were carried out with and without the nozzle in the bollard pull condition. This paper presents the results from these tests and discusses their importance for structures placed in the slipstream.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number6054
NPARC number8895706
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Record identifier08fc119c-f2fc-47d5-a7d0-8e63d54da9b5
Record created2009-04-22
Record modified2016-05-09
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