摘要
本文建立了平面热源法实验条件下的非稳态导热的数学模型 ,应用拉普拉斯变换和热四端网络法 ,求解了实验测量系统的解析模型和各种相应的简化模型。根据参数估计的基本原理 ,对模型中的待估计参数做了灵敏度分析。建立了实验测量系统 ,可以满足 2 0～ 2 0 0℃环境下固体材料蓄热系数测量的需要。测量了常温下几种材料的蓄热系数 。
An experimental installation for measuring the thermal effusivity of homogeneous solids by hot plane source method is described in this paper. A new mathematical model has been developed in order to consider the thermal capacity and the thermal resistance of the hot plane source and the thermal contact resistance between hot plane source and sample. The solution in Laplace domain has been obtained by “thermal quadrupole method” and the analysis of parameter sensibility coefficients have been done based on the parameter estimation theory. The experimental thermal effusivity data for several materials are given and compared with the data obtained by hot wire method.
出处
《计量学报》
EI
CSCD
北大核心
2001年第2期106-110,共5页
Acta Metrologica Sinica
