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)
David Taylor Naval Ship R&D CenterBethesda, MD USA 20084
- Beveridge, J L
- Publication Date: 1975-11
- Pagination: 37 p.
- 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;
- 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