CAJ | 학술논문

比较了不同低导热材料的高温热导率测试装置特点，确定了在整体加热方式下试样表面温度均匀性差是限制测试准确度提高的一个原因，提出采用分区加热的方法改善试样表面温度均匀性。选取三种不同热导率范围的材料作为被测试样，分别做了试样整体加热和分区加热的模拟计算。结果表明，整体加热方式只能在试样表面中心有限区域形成均温区，而分区加热方式能显著改善试样表面温度均匀性。
비교료불동저도열재료적고온열도솔측시장치특점，학정료재정체가열방식하시양표면온도균균성차시한제측시준학도제고적일개원인，제출채용분구가열적방법개선시양표면온도균균성。선취삼충불동열도솔범위적재료작위피측시양，분별주료시양정체가열화분구가열적모의계산。결과표명，정체가열방식지능재시양표면중심유한구역형성균온구，이분구가열방식능현저개선시양표면온도균균성。
The characteristics of thermal conductivity measurement apparatus for high temperature with different low thermal conductance were compared, and one of the reasons leading to low measure-ment accuracy was concluded, that is mainly caused by the poor temperature uniformity with whole heat-ing method. According to these analyses, the partition heating method was proposed for improving tem-perature uniformity of the specimen surface. Three materials with different thermal conductivity were used to experiment and simulation calculation through the whole heating and district heating method respective-ly. The experiment results show that a limited even surface temperature area can be formed on the center of the specimen with the whole heating method, and the entire surface temperature can be reached to a better uniformed state with the partition heating method.