Vortex Breakdown Over Unsteady Wings and Its Control.

Abstract

Control of vortex breakdown continues to be of vital importance because the breakdown may have a considerable effect on aircraft performance, such as the effect on the time-averaged lift force (Lee and Ho, 1990). Breakdown is also important because of the unsteady nature of flow downstream of vortex breakdown. The unsteadiness may affect the stability of the aircraft and also cause buffeting. The objectives of this work are to understand the physics of unsteady flow phenomena in vortex breakdown region, and to develop techniques for active (feedback) and passive (open loop) control of vortex breakdown over steady and unsteady delta wings.

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Document Details

Document Type
Technical Report
Publication Date
Nov 16, 1995
Accession Number
ADA304465

Entities

People

  • Ismet Gursul

Organizations

  • University of Cincinnati

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Computational Fluid Dynamics
  • Control Systems
  • Dynamic Response
  • Eddies (Fluid Mechanics)
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Leading Edge Flaps
  • Leading Edges
  • Measurement
  • Physics Laboratories
  • Pressure Measurement
  • Reynolds Number
  • Turbulent Mixing
  • Vortex Shedding

Fields of Study

  • Physics

Readers

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