计量学报2024，Vol.45Issue(6)：842-847,6.DOI:10.3969/j.issn.1000-1158.2024.06.09
基于COMSOL的热电偶检定炉温场性能研究
Research on Temperature Uniformity of Thermocouple Calibration Furnace Based on COMSOL
摘要
Abstract
The temperature field performance of thermocouple calibration furnace plays an important role in the calibration of base metal thermocouple and is an important parameter to evaluate the accuracy of thermocouple calibration.In the calibration specification for base metal thermocouples,it is proposed to use thermostatic block to improve temperature field performance of thermocouple calibration furnace.In order to explore how does the thermostatic block improve the uniformity,theoretical analysis was carried out on the main heat transfer methods to achieve temperature rise in the thermocouple calibration furnace.It is holds that the main heat transfer mode in furnace is heat conduction,and the use of alloy thermostatic block with large thermal conductivity and large volume heat capacity can effectively improve the internal thermal conductivity efficiency and enhance the stability of temperature field.Furthermore,numerical simulation was used to calculate the temperature field distribution inside the furnace.The calculation results showed that compared with not placing the thermostatic block,the maximum temperature difference in the axial direction is reduced to 1/3 of the original value,and the maximum temperature difference in the radial direction is reduced to 1/2 of the original value,which is consistent with the theoretical analysis.It is shows that placing thermostatic block is an important means to optimize the temperature field of thermocouple calibration furnace.关键词
温度计量/热电偶校准/温度场性能/均温块/传热方式/热传导/数值模拟Key words
temperature measurement/thermocouple calibration/temperature field properties/thermostatic block/heat transfer method/heat conduction/numerical simulation分类
通用工业技术引用本文复制引用
承磊,赵文韬,朱俊捷,朱东欢,聂红庆..基于COMSOL的热电偶检定炉温场性能研究[J].计量学报,2024,45(6):842-847,6.基金项目
上海市协同创新发展项目(2020-jmrh2-kj3) （2020-jmrh2-kj3）
