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Proceedings Paper

Infrared Radiometric Technique For Rapid Quantitative Evaluation Of Heat Flux Distribution Over Large Areas
Author(s): Stuart Glazer; Georg Siebes
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Paper Abstract

This paper describes a novel approach for rapid, quantitative measurement of spatially distributed heat flux incident on a plane. The technique utilizes the spatial temperature distribution on an opaque thin film at the location of interest, as measured by an imaging infrared radiometer. Knowledge of film radiative properties, plus quantitative estimates of convection cooling, permit the steady state energy balance at any location on the film sheet to be solved for the incident heat flux. Absolute accuracies on the order of 10-15% have been obtained in tests performed in air. The method is particularly useful for evaluation of spatial heat flux uniformity from distributed heat sources over large areas. It has recently been used in several applications at the Jet Propulsion Laboratory, including flux uniformity measurements from large distributed quartz lamp arrays used during thermal vacuum testing of several spacecraft components, and flux mapping of a low power NdYg laser beam.

Paper Details

Date Published: 21 March 1989
PDF: 10 pages
Proc. SPIE 1094, Thermosense XI: Intl Conf on Thermal Infrared Sensing for Diagnostics and Control, (21 March 1989); doi: 10.1117/12.953396
Show Author Affiliations
Stuart Glazer, California Institute of Technology (United States)
Georg Siebes, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 1094:
Thermosense XI: Intl Conf on Thermal Infrared Sensing for Diagnostics and Control
Gregory B. McIntosh, Editor(s)

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