Demonstration of Temperature Measurement on a Curved Surface Using Thermographic Phosphors

Abstract

An optical technique for surface temperature measurement based on the fluorescent emission of rare-earth ion-doped phosphors was demonstrated in an experiment with a heated cylinder in cross flow. In this experiment, a uniform heat flux is imposed by applying a constant voltage across the thin stainless-steel cylinder surface to produce surface temperatures between 24 deg. C and 55 deg. C. The fluorescent emission of a thermographic phosphor, lanthanum oxysulfide doped with europium (La2O2S:Eu+3) deposited on the surface, was recorded to determine the temperature distribution at the curved surface. when excited by ultraviolet radiation, the phosphor emits a spectrum containing certain emission lines, and the intensities of these vary with temperature.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2002
Accession Number
ADA408122

Entities

People

  • Charles Macarthur
  • Christopher Murawski
  • David Bizzak
  • Jamie Ervin
  • Minking Chyu

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Boundary Layer
  • Cross Flow
  • Engineering
  • Flow
  • Fluid Flow
  • Heat Flux
  • Heat Transfer
  • Intensity
  • Lanthanum
  • Measurement
  • Mechanical Engineering
  • Radiation
  • Stainless Steel
  • Surface Temperature
  • Turbines
  • Ultraviolet Radiation

Fields of Study

  • Materials science

Readers

  • Combustion and Flow Dynamics.
  • Materials Science and Engineering.
  • Pulsed Power and Plasma Physics.