用接触分热阻讨论接触热阻问题

为预测接触热阻，引入了接触分热阻概念，把接触热阻视为两个接触物体之间接触分热阻的串联，通过建立单热流通道上接触分热阻的截锥体模型及热流通道上的温度分布方程，研究了接触热阻中的三维传热现象。对该模型进行数值求解后得到截锥体接触模型上的温度分布情况，继而通过大量的数值计算，拟合出了一个求解单热流通道上接触分热阻的计算式。研究结果，在较大的范围内该式的计算值同数值解法的结果较为吻合，如果以这样单热流通道作为接触面上的当量单热流通道，则可以预测整个接触面上的接触热阻。

Approach to Thermal Contact Resistance Using the Concept of Detached Thermal Contact Resistance

To predict the value of thermal contact resistance, the concept of detached thermal contact resistance was introduced. The whole thermal contact resistance in the article is viewed as the connecting in series. The model of a heat channel was established and the distributed equations of the temperature were obtained in order to study the three dimensional phenomenon of heat transfer in the interface of solid. The temperatuer distribution is achieved by applying numerical method to the model. So the detached thermal contact resistance could be calculated and the fitting formula of the thermal contact resistance was obtained. The study shows the formula accords with the result well in most cases. If the model is applied to the equivalent heat channel of the interface, the whole thermal contact resistance of the interface could be predicted.