Ozone Flow Tagging Scheme for Air Inlet Testing

Abstract

Two separately tunable, narrowband excimer lasers were used to photo-dissociate O2. The O-atom photoproducts rapidly react with ambient O2 to form O3, and thus marked a volume of air with a line of ozone. After a fixed time delay, a second laser measured progress of the tagged volume of air by photodissociating ozone, and monitoring the vibrationally excited O2 photoproduct by planar laser induced fluorescence (PLIF). The spatial displacement of the tagged line was used to measure the velocity in a time-of-flight fashion. Because of ozone's rapid formation (^20 microsecs) and long chemical lifetime (^2 s), a broad range of velocity measurements are possible.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1999
Accession Number
ADA395004

Entities

People

  • Peter A. Debarber

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Chemical Kinetics
  • Chemical Reactions
  • Doppler Effect
  • Dye Lasers
  • Excimer Lasers
  • Gas Flow
  • Laser Beams
  • Laser Induced Fluorescence
  • Laser Pulses
  • Lasers
  • Measurement
  • Production Rate
  • Steady State
  • Test Facilities
  • Turbines
  • Wind Tunnels

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Molecular Photonics/Laser Physics
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers