Infrared Radiometric Technique For Rapid Quantitative Evaluation Of Heat Flux Distribution Over Large Areas

Stuart Glazer; Georg Siebes

doi:10.1117/12.953396

21 March 1989 Infrared Radiometric Technique For Rapid Quantitative Evaluation Of Heat Flux Distribution Over Large Areas

Stuart Glazer, Georg Siebes

Author Affiliations +

Proceedings Volume 1094, Thermosense XI: Intl Conf on Thermal Infrared Sensing for Diagnostics and Control; (1989) https://doi.org/10.1117/12.953396
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

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.

Citation Download Citation

Stuart Glazer and Georg Siebes "Infrared Radiometric Technique For Rapid Quantitative Evaluation Of Heat Flux Distribution Over Large Areas", Proc. SPIE 1094, Thermosense XI: Intl Conf on Thermal Infrared Sensing for Diagnostics and Control, (21 March 1989); https://doi.org/10.1117/12.953396

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