A joint computational and experimental study to evaluate Inconel-sheathed thermocouple performance in flames.

Brundage, Aaron L. ; Nicolette, Vernon F. ; Donaldson, A. Burl ; Kearney, Sean Patrick ; Gill, Walter

Sandia National Laboratories

关键词: Thermocouples.;    Flames;    36 Materials Science;    Thermocouples Flame.;    Inconel 600;   

DOI  :  10.2172/923075
RP-ID  :  SAND2005-3978
RP-ID  :  AC04-94AL85000
RP-ID  :  923075

美国|英语

来源: UNT Digital Library

【 摘 要 】

A joint experimental and computational study was performed to evaluate the capability of the Sandia Fire Code VULCAN to predict thermocouple response temperature. Thermocouple temperatures recorded by an Inconel-sheathed thermocouple inserted into a near-adiabatic flat flame were predicted by companion VULCAN simulations. The predicted thermocouple temperatures were within 6% of the measured values, with the error primarily attributable to uncertainty in Inconel 600 emissivity and axial conduction losses along the length of the thermocouple assembly. Hence, it is recommended that future thermocouple models (for Inconel-sheathed designs) include a correction for axial conduction. Given the remarkable agreement between experiment and simulation, it is recommended that the analysis be repeated for thermocouples in flames with pollutants such as soot.