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Performance and Modeling of Heat Flux Sensors in Different Environments.

pdf icon Performance and Modeling of Heat Flux Sensors in Different Environments. (893 K)
Holmberg, D. G.; Womeldorf, C. A.

NIST SP 971; August 2001.

NIST SP 971: "Collected Reports and Publications by the National Institute of Standards and Technology on Heat Flux Gage Calibration and Usage." AND Calibration, Error Analysis, and Modeling of Heat Flux Sensors Symposium. Proceedings. American Society of Mechanical Engineers (ASME) Heat Transfer Division. Volume 4. HTD-Vol. 364-4. November 14-19, 1999, Nashville, TN, American Society of Mechanical Engineers, New York, NY, 71-77 pp, 2001.

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heat flux; sensors; environment models


Heat flux measurement is not simple; care is required in selecting a suitable sensor for a given application. Surface substrate properties and the convective and radiative environment determine the choice of sensors. Mounting of the sensor, especially in calibration versus application, influences accuracy of measurement. The purpose of the present study is to increase awareness of potential errors in heat flux sensor use. This paper compares sensor performance in general by examining results of testing three eommercialIy available sensors and by numerical modeling of these sensors. Comparisons of sensor calibrations in the NIST convective heat flux calibration facility are made with manufacturer calibrations and give evidence of potential pitfalls when using a sensor in a different environment than the calibration environment. Modeling results help explain observed data, demonstrating specific sensor parameters that can lead to significantly different calibrations in different environments.