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|Author(s):||A V. Murthy; D P. DeWitt; Benjamin K. Tsai; Gerald T. Fraser; Robert D. Saunders;|
|Title:||Temperature and Flux Scales for Heat-Flux Sensor Calibration|
|Published:||September 01, 2003|
|Abstract:||Methodologies for calibrating heat-flux sensors designed for direct measurement of heat-transfer at a surface are presented. These sensors, extensively used in fire-test methods and aerospace applications, vary in range from a few kW/m2 to in excess of 500 kW/m2. Traceable source- and detector-based techniques using blackbody radiation are described to cover the wide range of calibration. Calibration results on typical sensors from three blackbody facilities: 25 mm and 51 mm diameter heated graphite tubes and a 23 cm diameter spherical cavity, are presented. These results demonstrate the equivalence between the source- and detector-based techniques in the range from 50 kW/m2 to 200 kW/m2, and also the superiority of detector-based calibration when reflected radiation effects are important. The problems associated with extending the calibration techniques to high heat-flux levels by inserting the sensor inside a blackbody cavity are also discussed.|
|Conference:||AIP Conference Proceedings|
|Proceedings:||Temperature, International Symposium | Eighth | Temperature: Its Measurement and Control in Science and Industry; Volume Seven | AIP|
|Dates:||October 21-24, 2002|
|Keywords:||blackbodies,heat flux,sensors,thermal radiation|