ASPECTS OF HYDROFOIL DESIGN; WITH EMPHASIS ON HYDROFOIL INTERACTION IN CALM WATER

The problem of foil interaction on a hydrofoil catamaran is studied. To calculate the resulting flow at the rear foil, methods based on lifting line theory and allowing for the rolling up of the free vortex sheet of the front foil are discussed. The direct and indirect problems are solved allowing changes in inflow conditions due to one or several front foils. Numerical calculations have been validated by model tests of foils in a tandem configuration. The possibility of reducing drag by placing the rear foil in regions with upwash is documented. Large spanwise variation in inflow conditions at the rear foil must be taken into account to avoid cavitation.

• Supplemental Notes:
  • FAST '91, 1st Intl Conf on Fast Sea Transportation; 17-21 June 1991; Trondheim, Norway. Procs. Publ by Tapir Publishers, Trondheim, v 1, p 143 [19 p, 10 ref, 2 tab, 16 fig]
• Authors:
  • Morch, J B
  • Minsaas, K J
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Catamarans; Flow; Fluid dynamics; Hydrofoils
• Uncontrolled Terms: Fluid flow; Interactions
• Old TRIS Terms: Lifting line theory
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00701726
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM