PROPELLER RPM INVESTIGATION FOR A LARGE HYDROFOIL CRAFT

A preliminary investigation of subcavitating, transcavitating, and supercavitating propellers was undertaken to determine the best reduction gear ratio for an 1100-ton hydrofoil. The results of this investigation indicate that a suitable pair of subcavitating, transcavitating, or supercavitating propellers can be designed for this craft if the propeller RPM lies between 550 and 700 RPM. Using one LM 2500 gas turbine engine per propeller and a 5:1 reduction between the turbine output and the propeller, a range of RPM's between 550 and 700 can be achieved by varying the maximum turbine RPM selected for the turbine at the full-power condition of 21,400 SHP. A propeller can be designed for the craft which will absorb this power anywhere between 550 and 700 propeller RPM.

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Ship Performance Department
  Bethesda, MD  United States  20084
• Authors:
  • Gregory, D L
• Publication Date: 1975-1

Media Info

• Pagination: 20 p.

Subject/Index Terms

• TRT Terms: Cavitation; Gas turbines; Horsepower; Hydrodynamics; Hydrofoil boats; Propellers; Reduction gears; Supercavitating propellers
• Old TRIS Terms: Hydrodynamic configurations; Hydrofoil craft; Marine propellers; Subcavitating propellers
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00090753
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SPD-602-01 Final Rpt.
• Files: TRIS
• Created Date: Jun 26 1975 12:00AM