Characterization of Perturbation Dynamics in Unsteady Flows

Abstract

We report on a joint theoretical, computational, and experimental effort to analyze perturbation dynamics about unsteady base states caused by a vortical wake, unsteady separation, and unsteady surface motion. From this project, we have developed analysis techniques to characterize perturbation dynamics about unsteady flows and demonstrated their uses for bluff body flow and fluid-structure interaction problems. Because the analyses of such problems require handling of high-degree of freedom, model reduction techniques were considered through modal analysis, phase-reduction, and randomized techniques. The current work paves the way for advancing our knowledge of unsteady flows with potential applications for accurate estimation, modeling, and control.

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Document Details

Document Type
Technical Report
Publication Date
Apr 08, 2020
Accession Number
AD1110522

Entities

People

  • Kourosh Shoele
  • Kunihiko Taira
  • Louis N Cattafesta

Organizations

  • Florida State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aeroelasticity
  • Aircrafts
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hydrodynamics
  • Hypervelocity Flow
  • Mechanical Phenomena
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Physics Laboratories
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.