SPECIAL PROBLEMS IN THE DESIGN OF SUPERCAVITATING HYDROFOILS

A review is made of high-speed phenomena affecting the design of single-strut supercavitating hydrofoils. Nonlinear theories for the analysis of section shape are used to show the interrelationship of section lift coefficient, lift-drag ratio, section modulus, leading edge stress, and center of pressure. The special effects of free surface proximity and gravity are considered using two-dimensional nonlinear theory. The finite aspect ratio effect is investigated using a linearized lifting-surface approach. All these effects are shown to reduce the cavity length at constant cavitation number. Some recent model designs at NSRDC will be discussed.

• Supplemental Notes:
  • Presented at the Advanced Marine Vehicles Conference, jointly sponsored by the American Institute of Aeronautics and Astronautics and the Society of Naval Architects and Marine Engineers, with the active cooperation and support of the United States Navy, San Diego, Calif., Feb. 25-28, 1974.
• Corporate Authors:

  AIAA/SNAME Advanced Marine Vehicles Conference

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Dobay, G F
  • Baker, E S
• Publication Date: 1974-2

Media Info

• Features: Appendices; References;
• Pagination: 17 p.

Subject/Index Terms

• TRT Terms: Aerodynamic lift; Free surface; Struts; Supercavitating hydrofoils
• Old TRIS Terms: Free surface effects; Lifting surface theory
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00054232
• Record Type: Publication
• Source Agency: American Institute of Aeronautics and Astronautics
• Report/Paper Numbers: Paper #74-309
• Files: TRIS
• Created Date: May 7 1974 12:00AM