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DOI: 10.1615/ICHMT.2010.RAD-6.410
11 pages

Travis J. Moore
Brigham Young University Provo, UT 84602 USA

Matthew R. Jones
Department of Mechanical Engineering, Brigham Young University, Provo UT 84602

Dale R. Tree
Brigham Young University Provo, UT 84602 USA; Ray W. Herrick Laboratories, School of M.E., Purdue University, W. Lafayette, IN 47907 USA

R. Daniel Maynes
Brigham Young University, Provo, Utah, 84602

Larry L. Baxter
Brigham Young University, Department of Chemical Engineering, Provo, UT 84602 USA


An experimental procedure has been developed to make spectral emittance and temperature measurements. The spectral emittance of an object is calculated using measurements of the spectral emissive power and of the surface temperature of the object obtained using a Fourier transform infrared (FTIR) spectrometer. A calibration procedure is described in detail which accounts for the temperature dependence of the detector. The methods used to extract the spectral emissive power and surface temperature from measured infrared spectra were validated using a blackbody radiator at known temperatures. The average error in the measured spectral emittance was 2.1% and the average difference between the temperature inferred from the recorded spectra and the temperature indicated on the blackbody radiator was 1.2%. The method was used to measure the spectral emittance of oxidized copper at various temperatures.

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