PERFORMANCE OF AZIMUTHING THRUSTERS

In the first section momentum theory is used to demonstrate that in order to absorb the large installed powers needed for this type of application, a nozzle propeller offers a more attractive solution than an open propeller. It is further shown that the realizable gains in efficiency from a nozzle propeller depend completely upon the thrust produced by the nozzle and its induced velocity at the propeller plane. A theoretical model is described that accurately accounts for the interaction between the propeller and its surrounding nozzle. Vortex theory is used for the nozzle and lifting line, with surface corrections, for the propeller. Computer predictions are shown to be good and comparison with published open water curves and special model tests at bollard condition are presented to illustrate the wide range of application of this theory.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0020868X
• Corporate Authors:

  International Periodical Press

  193 Heemraadssingel
  Rotterdam,   Netherlands 
• Authors:
  • Gibson, I S
• Publication Date: 1975-11

Media Info

• Features: References;
• Pagination: p. 367-374
• Serial:
  • International Shipbuilding Progress
  • Volume: 22
  • Issue Number: 255
  • Publisher: IOS Press
  • ISSN: 0020-868X
  • Serial URL: http://www.iospress.nl/journal/international-shipbuilding-progress/

Subject/Index Terms

• TRT Terms: Nozzles; Propellers; Thrusters
• Old TRIS Terms: Propeller efficiency; Thruster performance
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00135392
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 13 1976 12:00AM