Feedback Control of Vortex Flow

Abstract

The purpose of this overview is to show the utility of simple amplitude equations for the modelling of various vortex shedding phenomena. After a review of global modes which leads to the physical concept of local self-excited oscillators that act as 'generators' of Karman vortices in the near wake, the characterization of the vortex street by a single Stuart-Landau oscillator is discussed. The success beyond expectation of this model as well as the problems associated with it are documented. Among them, we focus on the neglect of spatial structure in the simple temporal Stuart-Landau model. The role of spatial structure in the streamwise direction is highlighted by a short discussion of the effect of feedback control, while in the last part of the paper the model is extended to include the spanwise structure of vortex shedding, in particular the effect of the cylinder ends.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1994
Accession Number
ADA331726

Entities

People

  • Peter A. Monkewitz

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Delta Wings
  • Equations
  • Feedback
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Group Velocity
  • Leading Edges
  • Measurement
  • Pressure Gradients
  • Reynolds Number
  • Turbulent Mixing
  • Two Dimensional
  • Vortex Shedding
  • Vortices

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Fluid Mechanics and Fluid Dynamics.
  • Team-Based Human-Centered Cognitive Task Decision Making and Information Performance.