PIV Diagnostics for Flow Control Applications

Abstract

We have developed a flexible instrumentation system for quantitative velocity-field measurement in a variety of experiments. The system integrates lasers, digital cameras, and a translation stage for PIV (particle image velocimetry) diagnostics. Several flows have already been investigated: the onset of vortex shedding in a water tow tank, development of a far wake in a water tow tank, Kelvin-Helmholtz instability in a wind tunnel, and a flow from a long crack in a pipe. Among the most important new results obtained with the experimental equipment provided by this grant is the following. We have determined the Reynolds number (i.e., critical velocity) at which the second wake (a regular pattern emerging in the far wake of a bluff body) is destroyed by turbulence.

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Document Details

Document Type
Technical Report
Publication Date
Jul 31, 2001
Accession Number
ADA395131

Entities

People

  • C. R. Truman
  • Peter Vorobieff

Organizations

  • University of New Mexico

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Cameras
  • Control Systems
  • Digital Cameras
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Hypervelocity Flow
  • Instability
  • Mechanical Engineering
  • New Mexico
  • Reynolds Number
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional
  • Vortex Shedding
  • Vortices
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Marine Hydrodynamics

Technology Areas

  • Directed Energy