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本文针对超导材料在低温和跨温区环境下的热传导特性,基于广义热传导理论并考虑超导材料低温下的比热、热导率的温度依赖性,建立了一描述超导复合带材在点热源触发下的非线性热传导模型.采用有限元法进一步求解获得了超导复合带材低温和跨温区环境下的温度场演化特征.研究结果表明:低温下超导复合材料的参数温度依赖性对其温度分布与热传导特性有着显著影响,其随初始环境温度的升高而逐渐减弱;热松弛时间对低温下超导材料的热传导具有显著影响.另外,文中还讨论了超导复合材料不同铜超比对其低温热传导的影响等.
In this paper, according to the heat conduction characteristics of superconducting materials at low temperature and across temperature, based on the generalized heat conduction theory and taking into account the temperature dependence of the specific heat and the thermal conductivity of superconducting materials at low temperature, Point heat source. The evolution of the temperature field in superconducting composite strip under low temperature and across temperature is obtained by finite element method. The results show that the temperature dependence of the temperature dependence of superconducting composite material at low temperature The temperature has a significant influence on the temperature distribution and the thermal conductivity, which decreases with the increase of the initial ambient temperature.The thermal relaxation time has a significant effect on the thermal conductivity of the superconducting material at low temperature.In addition, the different superconducting composites Copper over its low temperature heat conduction and so on.