THREE-DIMENSIONAL THEORY ON SUPERCAVITATING HYDROFOILS NEAR A FREE SURFACE

Supercavitating hydrofoils of large aspect ratio operating near a free surface are investigated, assuming an inviscid and irrotational flow with the effects of gravity and surface tension neglected. The flow near the foil, treated as two-dimensional, is solved by a nonlinear free-streamline theory, then a three-dimensional "downwash" correction is made using Prandtl's lifting-line theory. The strength of the lifting-line vortex is determined by information from the two-dimensional solution through a matching procedure, in which the inverse of aspect ratio is used as a small parameter for asymptotic expansions. The analysis incorporates a free-surface reference level to determine the submergence depth of the foil.

• Corporate Authors:

  Cambridge University Press

  200 Euston Road
  London NW1,   England 
• Authors:
  • Furuya, O
• Publication Date: 1975-9-23

Media Info

• Features: References;
• Pagination: p. 339-359
• Serial:
  • Journal of Fluid Mechanics
  • Volume: 71
  • Issue Number: Pt2
  • Publisher: Cambridge University Press

Subject/Index Terms

• TRT Terms: Free surface; Hydrofoil boats; Supercavitating hydrofoils
• Old TRIS Terms: Free surface effects; Hydrofoil craft
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00130872
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Apr 7 1976 12:00AM