THE LINEARIZED THEORY FOR SUPERCAVITATING HYDROFOILS OPERATING AT HIGH SPEEDS NEAR A FREE SURFACE

Abstract

Linearized cavity flow theory, in conjunction with a mapping technique, is used to develop general expressions for the characteristics of supercavitating or fully ventilated, two dimensional hydrofoils with prescribed pressure distributions, designed for operation near a free surface. It is assumed that the hydrofoils Are operating at zero cavitation number and that the Froude number - based on depth - is very large. The general expressions are used to derive the lift, cavity drag and shape of hydrofoils composed of 2-, 3-, and 5-term and constant pressure camber configurations, combined with angle of attack and quasi-parabolic thickness and designed for operation at specific depths. Examples of numerical results are given and the effect of foil strength is discussed and evaluated.

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Document Details

Document Type
Technical Report
Publication Date
Jun 08, 1961
Accession Number
AD0260504

Entities

People

  • J. Auslaender

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Cavitation
  • Complex Variables
  • Flow
  • Free Stream
  • Froude Number
  • Hydrodynamics
  • Hydrofoils
  • Inverse Problems
  • Leading Edges
  • Marine Engineering
  • Navy
  • Perturbations
  • Planing Surfaces
  • Pressure Distribution
  • Shape
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Fluid Dynamics.
  • Marine Propulsion Engineering and Naval Architecture