A new nickel based thermocouple for high temperature applications in gas turbines has been devised at the Department of Material Science and Metallurgy of the University of Cambridge. This paper describes the new features of the thermocouple, the drift tests on the first prototype, and compares the behavior of the new sensor with conventional mineral insulated metal sheathed Type K thermocouples: the new thermocouple has a significant improvement in terms of drift and temperature capabilities. Metallurgical analysis has been undertaken on selected sections of the thermocouples exposed at high temperatures, which rationalizes the reduced drift of the new sensor. A second prototype will be tested in subsequent research, from which further improvements in drift and temperature capabilities are expected.
An Improved Nickel Based MIMS Thermocouple for High Temperature Gas Turbine Applications
Contributed by the Controls, Diagnostics and Instrumentation Committee of ASME for publication in the Journal of Engineering for Gas Turbines and Power. Manuscript received March 9, 2013; final manuscript received April 30, 2013; published online July 31, 2013. Editor: David Wisler.
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Scervini, M., and Rae, C. (July 31, 2013). "An Improved Nickel Based MIMS Thermocouple for High Temperature Gas Turbine Applications." ASME. J. Eng. Gas Turbines Power. September 2013; 135(9): 091601. https://doi.org/10.1115/1.4024420
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