Unsteady Flows Around Three-Dimensional Lifting Surfaces

Abstract

The time-dependent flows around wings and slender bodies of revolution undergoing large-amplitude harmonic motions were investigated using unique flow visualization techniques. The lifting surfaces were towed in an 18- meter water channel at Reynolds numbers up to 750,000. The effects of planform, leading edge contour, reduced frequency and Reynolds number were investigated. The unsteady separation phenomenon was found to be significantly different from the separation on a lifting surface in steady flight. The role of the separation vortices was elaborated and a model of the flow field is proposed. Keywords: Pitch motion, Delta wings, Maneuverability, Unsteady separated flows, Lifting surfaces, Three-dimensional wings, Body of revolution, Supermaneuverability.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1985
Accession Number
ADA206331

Entities

People

  • Mohamed Gad-el-hak

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Air Force
  • Aircrafts
  • Bodies Of Revolution
  • Boundary Layer
  • Cameras
  • Computational Fluid Dynamics
  • Fighter Aircraft
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Photographs
  • Slender Bodies
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Marine Hydrodynamics