FLUTTER OF A TWO-DEGREE-OF-FREEDOM HYDROFOIL IN TWO-DIMENSIONAL SUBCAVITATING FLOW

Abstract

Four hydrofoil flutter tests were performed in a towing basin and a 36-inch water tunnel using a two-degree-of-freedom hydrofoil in two-dimensional flow. Mass ratio, mass unbalance, heave stiffness, angle of attack, and foil depth were varied. All of these parameters significantly affected the flutter boundaries. Comparisons were made with a flutter theory based on the Theodorsen analysis. Theory gave good flutter predictions at high mass ratios but failed at low mass ratios.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1970
Accession Number
AD0704100

Entities

People

  • Daniel S. Cieslowski
  • Peter K. Besch

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Control Surfaces
  • Control Systems
  • Equations
  • Equations Of Motion
  • Flow
  • Frequency
  • Hydrofoils
  • Leading Edges
  • Oscillographs
  • Photographs
  • Pressure Distribution
  • Resonant Frequency
  • Ships
  • Test Facilities
  • Two Dimensional
  • Variable Pressure
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Marine Hydrodynamics