Characterization of Iodine Quenching and Energy Transfer Rate Constants for Supersonic Flow Visualization Applications

Abstract

Planar laser induced fluorescence (PLIF) imaging is being used to study the fluid dynamics of supersonic gas mixing in the nozzle from a chemical oxygen iodine laser (COIL). PLIF images are recorded using laser excitation of the I(sub2) B-X transition. Data for the temperature dependences of the I(sub2)(B) quenching rate constants are needed for the quantitative interpretation of the PLIF data. A Mach 2.6 supersonic nozzle system has been used in an investigation of the quenching of I(sub2)(B) by N(sub2), O(sub2) and He over the temperature range from 120 to 295 K. Quenching by both N(sub2) and O(sub2) exhibited a near linear dependences on temperature for T>150 K. Quenching by He was found to be unimportant under typical COIL operating conditions. The quenching rate constants have been used in a preliminary analysis of PLIF images.

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Document Details

Document Type
Technical Report
Publication Date
Sep 28, 2007
Accession Number
ADA472946

Entities

People

  • Michael C Heaven

Organizations

  • Emory University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Lasers
  • Chemical Oxygen Iodine Lasers
  • Computational Fluid Dynamics
  • Computational Science
  • Dye Lasers
  • Dynamics
  • Energy Transfer
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Gas Flow
  • Laser Applications
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Supersonic Flow

Fields of Study

  • Physics

Readers

  • Analytical Mechanics
  • Fluid Dynamics.
  • Molecular Photonics/Laser Physics

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Hypersonics
  • Hypersonics - Hypersonic Flow