Particle Image Velocimetry

Abstract

We will develop Particle Image Velocimetry (PIV) as a viable turbulence research tool at a near-wall flow facility (glycerin tunnel). The PIV technique is used to study the influence of controlled disturbances on the fluid structure in the very near wall region and compare these results with those from an ongoing LDA study. A PIV system may be conveniently separated into two parts: an image acquisition system and an image interrogation system. The image acquisition system is now operational, while the image acquisition system is still under development. The system consists of a small Helium-Neon laser and the associated optics needed for picture illumination and transformation, an x-y traversing system for accurate slide positioning during interrogation, a CCD camera and an image monitor. The interrogation system optically transforms a laser illumination image and then uses a Young's fringe pattern based technique to analyze the image and reconstruct the velocity field. This interrogation system is tied to a Swan 386 microcomputer and established that all the hardware and software functions properly.

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Document Details

Document Type
Technical Report
Publication Date
Feb 12, 1992
Accession Number
ADA246638

Entities

People

  • S. Deutsch

Organizations

  • Pennsylvania State University

Tags

DTIC Thesaurus Topics

  • Acquisition
  • Flow
  • Fluid Flow
  • Helium Neon Lasers
  • Illumination
  • Image Processing
  • Interrogation
  • Lasers
  • Particle Image Velocimetry
  • Particles
  • Ruby Lasers
  • Stratified Fluids
  • Turbulence

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Fluid Mechanics and Fluid Dynamics.
  • Image Processing and Computer Vision.

Technology Areas

  • Directed Energy