【摘要】 本文深入研究了线热源探针和它的测试条件与理想线热源的求解边界条件之间不可能完全一致后,提出了利用实验所得数据回归的近似式进行自身校正的“两点式还原法”;使探针测定导热系数的准确度和可靠性提高到一个新的高度,扩大了探针的适用范围。所测定的水和甲苯等介质的导热系数与近期发表的据认为是最准确的数据相比,不确定度在±0.72%以内。更多还原

【Abstract】 After studying thorougly the imposibly complete same of the line source probe and its experimental couditions between the solv- ing boundary conditions of the ideal line sonrce solution,we pro- pose a correction method that stems from the data obtained in our experiments.This method is called“the reduction of two-point formula”.Thus the accuracy and reliability of the probe for meas- uring the thermal conductivity are significantly improved.The applied range of the probe is expanded.The relative error of the obtained thermal conductivity of water,toluene and so on comp ared with the best accuracy data which are known in the present publications is within ±0.7%.更多还原