EXPERIMENTAL DETERMINATION OF VARIATION OF HYDROFOIL FLUTTER SPEED WITH MASS RATIO.

Abstract

A description of the design and fabrication of a family of four hydrofoil flutter models is given. These models had identical geometric and elastic properties, differing only in mass ratio. The heaviest was a direct half-scale model of an earlier flutter model. A flutter point was approached to within an estimated 1/2 knot with the heavier model, and it was near the value predicted by scaling considerations. No flutter points were measured with the three remaining models, however, as the torsional divergence speed was lower than flutter speeds for them. This was rather unexpected, as the elastic axis was at the quarter-chord--usually considered to be far enough forward to ensure a high divergence speed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0708061

Entities

People

  • Guido E. Ransleben Jr.

Organizations

  • Southwest Research Institute

Tags

DTIC Thesaurus Topics

  • Elastic Properties
  • Fabrication
  • Hydrofoils
  • Material Forming Processes
  • Materials Processing
  • Mechanical Working
  • Models
  • Scale Models

Readers

  • Computational Modeling and Simulation
  • Marine Hydrodynamics
  • Structural Dynamics.