The goal of this thesis is to develop a set of standards for use in calibrating heat
flux gages at elevated temperatures in a radiant heat transfer environment by
comparing several "trial" standards. Ideally, the same incident heat flux is
derived from each standard when exposed to the same heat source. Three
heat flux standards are proposed and evaluated. The standards are based on
temperature measurements, material properties, and electrical measurements.
The theory and design of each standard are described, as are the calibration
procedures used. For experimental comparisons, two standards are
simultaneously exposed to heat fluxes of up to 220 W/cm2 by placing one
standard on each side of a graphite flat plate heater.
The temperature measurement based standard derives incident heat flux from
the temperature of a blackbody heat source and the Stefan-Boltzmann law. The
heat flux gage employed in this standard is a water-cooled Gardon gage. This
standard does not operate at high temperatures. The calibration of this
standard produced highly repeatable results.
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