BLADE SPINDLE MOMENT ON A FIVE-BLADED CONTROLLABLE-PITCH PROPELLER

Blade spindle-moment values are presented for the operation of a five-bladed controllable-pitch propeller over a range of blade pitches and advance conditions. Spindle moment (blade turning effort) was measured on a single blade of NSRDC Model Propeller 4402 in an experimental program conducted in the 24-in. variable-pressure water tunnel. Experimental results are presented as mean spindle-moment values taken at steady-state operating conditions. No transient or time-dependent data were taken. The operating conditions investigated (1) positive pitch--steady ahead, (2) negative pitch--steady backing, and (3) negative pitch--ahead advance. The spindle moment due to hydrodynamic loading and that due to centrifugal forces were separated and nondimensionalized. The effects of Reynolds number and propeller blade cavitation are discussed briefly. (Author)

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Ship Performance Department
  Bethesda, MD  United States  20084
• Authors:
  • Denny, S B
  • Nelka, J J
• Publication Date: 1972-1

Media Info

• Pagination: 30 p.

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Cavitation erosion; Controllable pitch propellers; Data collection; Dynamometers; Hydrodynamic pressure; Hydrodynamics; Pitch (Acoustics); Pitch (Dynamics); Propeller blades; Propellers; Reynolds number; Test facilities; Thrust; Variable pitch propellers; Viscosity; Water tunnels
• Old TRIS Terms: Cavitating propellers; Hydrodynamic forces; Marine propellers; Spindle moments
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00154721
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SPD-3729 R&D Rpt.
• Files: TRIS
• Created Date: May 31 1977 12:00AM