Certificate of Registration Media number Эл #ФС77-53688 of 17 April 2013. ISSN 2308-6033. DOI 10.18698/2308-6033
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Analysis of temperature measuring error in high-temperature ceramic samples with various methods of thermocouple fixing

Published: 24.12.2021

Authors: Nikonova V.D., Yuldashev Z.N., Denisov O.V., Denisova L.V.

Published in issue: #12(120)/2021

DOI: 10.18698/2308-6033-2021-12-2141

Category: Aviation and Rocket-Space Engineering | Chapter: Design, construction and production of aircraft

The evaluation of methodological errors in measuring the temperature of nitride ceramics under unilateral heating by high-intensity heat flow was carried out. Simulation of thermal processes in the temperature sensor — sample system was performed using the Siemens PLMNX program. Various methods of fixing platinum-rhodium thermocouples with a diameter of 0.1 mm on the surface and inside the samples have been investigated. The regularities of the influence of the size of the hot junction, the presence of thermal cement, the shape of the grooves for fixing thermocouples on the methodological error of temperature measurement were investigated. Significant errors were revealed when installing thermocouples on the surface of the sample without violating its integrity. Recommendations for the installation of thermocouples were given. The results of the paper can be useful in the preparation of experimental samples for thermal tests on radiation heating stands.

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