Simultaneous High-resolution Optical Wavefront and Flow Diagnostics for High-speed Flows

Abstract

Simultaneous high spatial-resolution flow visualization and wavefront sensing are used to investigate the optical aberrations that occur due to a compressible shear layer. A preliminary model is developed to relate flow visualization images with wavefronts measured using a Shack-Hartmann wavefront sensor. Initial results are quite encouraging as a comparison between the Shack-Hartmann measured wavefronts and wavefronts produced by applying the model to flow visualization images produces correlation levels well above 0.7. Future work will incorporate a more realistic geometry to further develop the model and investigate the effects of individual large-scale structures on wavefront distortion with more detail.

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Document Details

Document Type
Technical Report
Publication Date
Jun 26, 2003
Accession Number
ADA601987

Entities

People

  • Bradley Duncan
  • Brian S Thurow
  • Jeff Widiker
  • Mohammad Samimy
  • Scott Harris
  • Walter Lempert

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Air Platforms
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Detectors
  • Diffraction
  • Directed Energy Weapons
  • Flow Visualization
  • Frequency
  • High Resolution
  • Measurement
  • Optics
  • Refraction
  • Refractive Index
  • Scattering
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional
  • Wavefronts

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Phased Array Antenna Design.