CAVITATION PERFORMANCE OF PROPELLERS WITH AND WITHOUT CUPPING

Four commercial propellers were characterized over a range of cavitation numbers and advance coefficients. Three of the propellers were then cupped to different degrees on the trailing edge and characterized over the same range of cavitation numbers and advance coefficients. The results show an increase in K sub T, K sub Q, and effective pitch corresponding to increasing degrees of cupping. An empirical relationship is derived between the amount of cupping and the resulting increase in effective pitch. It is concluded that cupping is an effective means of correcting an underpitched propeller, at the expense of efficiency and danger of increased cavitation. (Author)

• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Ship Performance Department
  Bethesda, MD  United States  20084
• Authors:
  • Peck, J G
  • Fisher, B L
• Publication Date: 1976-9

Media Info

• Pagination: 43 p.

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Cavitation erosion; Coefficients; Deflection; Performance; Pitch (Dynamics); Propellers; Thrust; Torque; Trailing edges; Variables
• Old TRIS Terms: Marine propellers; Performance engineering; Propeller performance; Propeller pitch; Variations
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00146960
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SPD-725-01
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM