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Facility for Calibrating Heat Flux Sensors in a Convective Environment.


pdf icon Facility for Calibrating Heat Flux Sensors in a Convective Environment. (621 K)
Holmberg, D. G.; Steckler, K. D.; Womeldorf, C. A.; Grosshandler, W. L.

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 American Society of Mechanical Engineers (ASME) Heat Transfer Division. Proceedings. Volume 3. HTD-Vol. 353. June 16-21, 1997, Dallas, TX, 165-171 pp, 2001.

Available from:

For More Information on NIST SP 971 visit: WEBSITE: http://www.bfrl.nist.gov/866/heatflux/index.htm

Keywords:

heat flux; sensors; nozzles; heaters; thermocouples; temperature measurements

Abstract:

The National Institute of Standards and Technology (NIST) presently conducts heat flux sensor calibrations using standard radiation methods. In practice, however, many heat flux sensors are used in test environments where convective heat transfer dominates. Equivalent fluxes in radiation or convection can produce different sensor responses due to sensor surface properties (e.g., emissivity, roughness) and near-surface structure (e.g., transmissivity, temperature distribution). These issues are being addressed at NIST by the development of a convective heat flux facility. By extending calibration capabilities to include a primarily convective environment direct comparisons of sensors in controlled convective and radiative environments will be possible. This report describes the progress of the convective heat flux calibration facility under development at NIST.