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21 March 1989 Infrared Radiometric Technique For Rapid Quantitative Evaluation Of Heat Flux Distribution Over Large Areas
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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.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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