A convection calibration method for local heat flux gages
Abstract
An apparatus for calibrating local heat flux gages in convective air flows is described. Heat transfer was measured using a guarded hot-plate technique from a 'hot' gage to a 'cold' fluid. The system was used to calibrate Gardon-type circular foil heat flux gages of 1/8 and 1/16 inch outer diameters. The results indicate a non-linear calibration curve which differs from the linear calibration obtained using the standard radiation technique. The difference matches an analysis which accounts for the effect of the temperature distribution in the gage foil. This distribution can be neglected in the standard radiation calibration but is often significant in convection applications.
- Publication:
-
National Heat Transfer Conference
- Pub Date:
- August 1984
- Bibcode:
- 1984nht..conf.....B
- Keywords:
-
- Air Flow;
- Calibrating;
- Convective Heat Transfer;
- Heat Flux;
- Thermal Conductivity Gages;
- Temperature Gradients;
- Fluid Mechanics and Heat Transfer