Visualization of Three-Dimensional Flow Structures About a Pitching Forward Swept Wing

Abstract

Three-dimensional forced unsteady flow separation about a 30 degree forward swept wing was visualized for a constant pitch rate motion from zero to 60 degrees. The development of both wing tip and inboard leading edge vortices were observed with characteristics similar to those found in straight wing tests. The off-axis pitch geometry appeared to delay the initiation of the wing tip vortex to large angles of attack, indicative of a delayed lift response. The results are contrasted with previous straight wing findings using similar pitch motions and swept wing results obtained using sinusoidal motion histories. (edc)

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Document Details

Document Type
Technical Report
Publication Date
Jun 08, 1987
Accession Number
ADA227963

Entities

People

  • F. T. Gilliam
  • J. B. Wissler
  • Jason Walker
  • M. C. Robinson

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Boundary Layer
  • Brushless Dc Motors
  • Convection
  • Delta Wings
  • Flow Fields
  • Flow Separation
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • High Angles
  • Leading Edges
  • Swept Wings
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Computational Modeling and Simulation