Limit Cycle Oscillations and Nonlinear Aeroelastic Wing Response: Reduced Order Aerodynamic Models

Abstract

To develop an eigenmode or proper orthogonal decomposition (POD) modal representation of unsteady aerodynamic forces on oscillating flexible airfoils and wings and thereby reduce the size and cost of mathematical models for such forces by several orders of magnitude. Building on earlier work for two-dimensional inviscid flows, we seek to extend our models to. three-dimensional flows with viscous effects included. Also a novel form of the harmonic balance (HB) method had been developed for determining limit cycle oscillations (LCO) of aeroelastic systems.

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Document Details

Document Type
Technical Report
Publication Date
Dec 31, 2003
Accession Number
ADA426484

Entities

People

  • Earl H. Dowell
  • Kenneth C. Hall

Organizations

  • Duke University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Boundary Layer
  • Computational Fluid Dynamics
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Inviscid Flow
  • Materials Science
  • Mathematical Models
  • Models
  • Oscillation
  • Three Dimensional
  • Three Dimensional Flow
  • Transonic Flow
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.