Measurement errors for thermocouples attached to thin plates: Application to heat flux measurement devices

Conference · Sat Dec 31 23:00:00 EST 1988

OSTI ID:5886500

Sobolik, K. B.; Keltner, N. R.; Beck, J. V.

Unsteady Surface Element (USE) methods are applied to a model of a thermocouple wire attached to a thin disk. Green's functions are used to develop the integral equations for the wire and the disk. The model can be used to evaluate transient and steady state responses for many types of heat flux measurement devices including thin skin calorimeters and circular foil (Gardon) heat flux gages. The model can accommodate either surface or volumetric heating of the disk. The boundary condition at the outer radius of the disk can be either insulated or constant temperature. Effect on the errors of geometrical and thermal factors can be assessed. Examples are given. 24 refs., 11 figs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5886500
• Report Number(s): SAND-89-0359C; CONF-890819-6; ON: DE89007420
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
CALORIMETERS
ENERGY TRANSFER
EQUATIONS
ERRORS
FUNCTIONS
GREEN FUNCTION
HEAT FLUX
HEAT TRANSFER
INTEGRAL EQUATIONS
MEASURING INSTRUMENTS
MEASURING METHODS
PHYSICAL PROPERTIES
TEMPERATURE MEASUREMENT
THERMAL CONDUCTIVITY
THERMOCOUPLES
THERMODYNAMIC PROPERTIES