A Computational and Experimental Investigation of Incompressible Oscillatory Airfoil Flow and Flutter Problems

Abstract

In this thesis several incompressible oscillatory flow and flutter problems were investigated. First, a previously developed unsteady panel code was modified so that systematic comparisons with Theodorsen's classical theory could be accomplished. It was found that the panel code is in excellent agreement with the Theodorsen results. Second, the panel code was applied to the analysis of bending-torsion flutter. Again, general agreement with Theodorsen's flutter predictions was obtained. In the experimental part of the thesis two flow visualization experiments were performed. First, the vortical flow patterns generated by an airfoil executing harmonic plunge oscillations were visualized. In the second experiment, the interference effects between a stationary airfoil and a small vane executing plunge oscillations were explored.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1993
Accession Number
ADA268748

Entities

People

  • Peter J. Riester

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Counter IED
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aerodynamic Forces
  • Boundary Layer
  • Equations
  • Equations Of Motion
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Frequency
  • Geometry
  • Oscillation
  • Phase Shift
  • Physical Properties
  • Resonant Frequency
  • Steady Flow
  • Three Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Fluid Mechanics and Fluid Dynamics.