Effect of Rotation Rate on the Forces of a Rotating Cylinder: Simulation and Control

Abstract

This paper presents numerical solutions to several optimal control problems for an unsteady viscous flow. The main thrust of this work is devoted to simulation and control of an unsteady flow generated by a circular cylinder undergoing rotary motion. By treating the rotation rate as a control variable we formulate two optimal control problems and use a central difference/ pseudospectral transform method to numerically compute the optimal control rates. Several types of rotations are considered as potential controls and we show that a proper synchronization of forcing frequency with the natural vortex shedding frequency can greatly influence the flow. The results here indicate that using moving boundary controls for such systems may provide a feasible mechanism for flow control

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1993
Accession Number
ADA265452

Entities

People

  • John A. Burns
  • Yuh-roung Ou

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Boltzmann Equation
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hypervelocity Flow
  • Mechanical Properties
  • Simulations
  • Steady State
  • Stratified Fluids
  • Unsteady Flow
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.
  • Robotics and Automation.