热丝法测导热系数的固有误差分析及修正

对测量材料导热系数的热丝法的原理性误差进行了分析研究，结果表明，热丝几何半径和热容量所造成的误差必须进行修正。文中给出了一个简单实用的修正公式，本文还探索性地分析研究了被测介质初始温度分布不均匀对测量结果的影响。

Analysis on Intrinsic Errors of Hot Wire Method for Measuring Thermal Conductivity and Its Modification

An analysis is made on the principal errors of the transient hot wire method for measuring thermal conductivity.It is shown by extensive numerical computations that the errors resulted from the non zero radius and the thermal capacity of the hot wire are intrinsic.The errors can be up to 6% and therefore should be modified.A simple and practical method is proposed for modifying these errors,based on the analysis of the numerical results.Study is also carried out of the influences of the non homogeneous initial temperature profiles of measured media on the hot wire measurement results.