VENTILATION INCEPTION ON A SURFACE-PIERCING DIHEDRAL HYDROFOIL WITH PLANE-FACE WEDGE SECTION

Abstract

A surface-piercing, dihedral hydrofoil was tested to investigate the inception and extent of ventilation. The foil of wedge-shaped cross-section and dihedral angle of 30 degrees was shown to ventilage under a number of operating conditions when the speed, draft, and angle of attack were varied. Stable regions of fully attached and fully ventilated flow are defined by ventilation inception boundaries which are shown to depend on the speed and angle of attack and not on the depth of submergence. Expressions for the forces experienced by the foil under these stable flow conditions are derived and are shown in good agreement with the experimental results.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1963
Accession Number
AD0423951

Entities

People

  • Gerard Fridsma

Organizations

  • Stevens Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Aspect Ratio
  • Civil Engineering
  • Dihedral Angle
  • Engineering
  • Fluid Dynamics
  • Fluid Mechanics
  • Hydrodynamics
  • Leading Edges
  • Marine Engineering
  • Mechanics
  • Naval Architecture
  • Navy
  • New York
  • Plastic Explosives
  • Ship Model Basins
  • Stagnation Point

Readers

  • Combustion and Flow Dynamics.
  • Marine Hydrodynamics
  • Marine Propulsion Engineering and Naval Architecture