Optimal Controller for Turbulent Flow Over an Airfoil

Abstract

The objectives of this project are twofold: to develop a detached-eddy simulation (DES) technique for turbulent flows past an airfoil at a high angle of attack, and to explore new control strategies for the separated flow, utilizing modern control theories. A system identification approach is used to construct an approximate linear system model for complex flows. The linear quadratic Gaussian (LQG) control synthesis is then used to design optimal controllers for the identified linear model. A system-identification-LQG approach is applied to control a separated boundary layer flow on a flat plate. The controller design based on the identified linear model is shown to reduce the time-averaged separation bubble size.

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Document Details

Document Type
Technical Report
Publication Date
May 17, 2006
Accession Number
ADA455957

Entities

People

  • John J Kim

Organizations

  • University of California Regents

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Computer Programs
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Kalman Filters
  • Linear Systems
  • Mathematical Filters
  • Nonlinear Dynamics
  • Stratified Fluids
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Fluid Mechanics and Fluid Dynamics.