Flutter and Divergence Characteristics of Four Low Mass Ratio Hydrofoils

Abstract

Four low mass ratio hydrofoil models of aspect ratio 5 were flutter tested. The flutter speed of the mass ratio 0.963 model was 24.7 knots. The other three models, of mass ratios 0.455, 0.395, and 0.202, were subject to static failure in bending at about 36 knots and did not flutter below this speed. The results were compared with the predictions of three flutter theories. All theories gave conservative flutter speed predictions at mass ratio 0.963. Two of the theories were also conservative at mass ratio 0.455.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1971
Accession Number
AD0719891

Entities

People

  • Peter K. Besch
  • Yuan-ning Liu

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aspect Ratio
  • Elastic Properties
  • Equations
  • Free Stream
  • Frequency
  • Hydrofoils
  • Marine Engineering
  • Materials
  • Measurement
  • Research Facilities
  • Resonant Frequency
  • Strain Gages
  • Test Facilities
  • Three Dimensional
  • Two Dimensional
  • Vibration
  • Water Tunnels

Fields of Study

  • Physics

Readers

  • Marine Hydrodynamics
  • Regression Analysis.