THEORETICAL ANALYSIS OF CYCLOIDAL PROPELLERS

A theoretical analysis of a cycloidal propeller was developed which accounts for the detailed structure of the wakes shed from the blades and their influence on blade loading. The analysis was developed for the two-dimensional case (infinite blade aspect ratio) and programmed for a digital computer. Calculations made over a range of pitch and advance ratio values indicate the wake to have a major influence in reducing the blade loading at low advance ratios. High local blade loadings occur when a blade passes near a wake vortex, and blade stall must be accounted for in the method. Comparisons with model propeller data indicate that the theory predicts the proper trends and levels of thrust, side force, and torque over a wide range of advance ratio and pitch. (Author)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/NEAR168C
• Supplemental Notes:
  • See also AD-768911/9, Part 2. Program Manual; Repr PC: $5.00; Microfiche: $1.45.
• Corporate Authors:

  Nielsen Engineering and Research Incorporated

  Mountain View, CA  United States 
• Authors:
  • Mendenhall, M R
  • Spangler, S B
• Publication Date: 1973-6-30

Media Info

• Pagination: 95 p.

Subject/Index Terms

• TRT Terms: Airfoils; Analysis; Blade loading; Blades (Machinery); Cavitation (Mechanics); Curvature; Cycloidal propellers; Information processing; Mathematical models; Mechanical loads; Performance; Propellers; Vortices; Wakes
• Uncontrolled Terms: Computer aided analysis
• Old TRIS Terms: Marine propellers; Performance engineering; Propeller loading; Propeller theory
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00051737
• Record Type: Publication
• Source Agency: National Technical Information Service
• ISBN: NEAR-168/C
• Report/Paper Numbers: NEAR-TR-53 Final Rpt
• Contract Numbers: N00014-70-C-0346
• Files: TRIS
• Created Date: Mar 25 1974 12:00AM