Three-dimensional Vortex Dynamics in Unsteady, Separated Flows

Abstract

Plenoptic particle image velocimetry was used to acquire volumetric flow field measurements on a transient maneuvering wing of aspect ratio 2, articulated in pitch, roll, and combined roll and pitch. A vorticity transport framework was adapted to accommodate the non-inertial reference frame attached to the wing, and used to quantify the sources and sinks of vorticity governing the development of the leading-edge vortex on the wing. Two new parameters were developed for classifying the flow topology and evolution with varying kinematics. Passive bleed was implemented, locally on a rolling wing, which significantly altered the global flow structure and underlying transport mechanisms.

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Document Details

Document Type
Technical Report
Publication Date
Jul 15, 2019
Accession Number
AD1097229

Entities

People

  • Brian S Thurow
  • James Buchholz
  • Kevin J. Wabick
  • Kyle Johnson
  • Randall Jr L. Berdon

Organizations

  • University of Iowa

Tags

Communities of Interest

  • Cyber
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Boundary Layer
  • Buoyancy
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • Hydrodynamics
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanics
  • Physics Laboratories
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Control Systems Engineering.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)