Convection calibration method for local heat flux gages

Journal Article · Sun Feb 01 04:00:00 EST 1987 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3248073· OSTI ID:6864389

Borell, G J; Diller, T E

An apparatus for calibrating local heat flux gages in convective air flows is described. Heat transfer from a ''hot'' gage to a ''cold'' fluid was measured using a guarded hot-plate technique. The system was used to calibrate Gardon-type circular foil heat flux gates of 1/8 in. and 1/16 in. outer diameters. The reslts indicate that the calibration curves are nonlinear, which is different from the linear calibration obtained using the standard radiation technique. The degree of nonlinearity matches the analysis which accounts for the effect of the temperature distribution in the gage foil. The effect of this temperature distribution can be neglected in the standard radiation calibration but is often significant in convection applications. These results emphasize the importance of calibrating heat flux gates in thermal environments similar to those in which they will be used.

• Research Organization: Harris Corporation, GASD, Melbourne, FL 32902
• OSTI ID: 6864389
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 109:1; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
AIR FLOW
CALIBRATION
CONVECTION
ENERGY TRANSFER
FLUID FLOW
GAS FLOW
HEAT FLUX
HEAT TRANSFER
MASS TRANSFER
MEASURING METHODS
NONLINEAR PROBLEMS
TEMPERATURE DISTRIBUTION