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Related Experiment Videos

Enhanced flow visualization with near-resonant holographic interferometry.

Timothy J McIntyre1, Alexis I Bishop, Troy N Eichmann

  • 1Department of Physics, University of Queensland, Brisbane 4072, Australia. mcintyre@physics.uq.edu.au

Applied Optics
|August 15, 2003
PubMed
Summary

Holographic interferometry detects sodium concentration in high-speed gas flows. This method visualizes low-density flows and estimates boundary layer temperature.

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Area of Science:

  • Fluid Dynamics
  • Optical Physics
  • Spectroscopy

Background:

  • Standard interferometry struggles with low-density gas flows.
  • High-speed, high-temperature gas flows present measurement challenges.

Purpose of the Study:

  • To adapt holographic interferometry for gas flow analysis.
  • To detect and quantify sodium concentration in gas flows.
  • To visualize previously undetectable low-density flows.

Main Methods:

  • Utilized laser output tuned near a resonant sodium transition.
  • Employed holographic interferometry.
  • Controlled laser detuning and seeded sodium concentration.

Main Results:

  • Successfully detected and quantified sodium concentration.

Related Experiment Videos

  • Achieved flow visualization in low-density flows.
  • Estimated temperature in the boundary layer of a flat plate flow.

    • Conclusions:

    • Holographic interferometry is effective for analyzing high-speed, high-temperature gas flows.
    • The technique enables visualization of low-density flows.
    • This method provides a means for boundary layer temperature estimation.