TYPICAL HULL-RUDDER-PROPELLER INTERFERENCES FOR TWIN-SCREW SHIPS WITH TRANSOM STERN

Twin-screw ships with transom stern have shown large variations in the components of the propulsive coefficient. Some significant parameters in the propeller-hull-rudder interaction problem have been identified and their effects evaluated in both a generalized sense and a specific LHA ship model. The most important conclusions arising from LHA-model experiments and other investigations are: propeller-rudder gap ratio was a major parameter in propulsion efficiency. The variable wake at the propeller was of paramount importance in selecting propeller direction of rotation exerted a dominant effect on the hull efficiency elements of an LHA model, and, for that case, the superiority of inward rotation with regard to propulsive coefficient was explained. (Author)

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Bethesda, MD  United States  20084
• Authors:
  • Beveridge, J L
• Publication Date: 1975-11

Media Info

• Pagination: 37 p.

Subject/Index Terms

• TRT Terms: Engine efficiency; Force; Hulls; Propellers; Propulsion; Rudders
• Old TRIS Terms: Hull propeller interaction; Propeller rudder interaction; Propulsive efficiency; Rudder forces; Twin screws
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00134617
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DTNSRDC-3823 R&D Rpt.
• Files: TRIS
• Created Date: Jun 9 1976 12:00AM