摘要
本文介绍了无限大平板冷却过程中表面及中心的瞬态温度场的测量以及同时确定物体导热系数λ ,导温系数α和比热容c的原理及方法 ,并对测量误差进行了分析与计算。结果表明在置信概率为 95%时 ,α、λ和c的扩展不确定度分别不大于 3%、5%和 7%。
The principle and method of simultaneous determination of thermal conductivity λ , thermal diffusivity α and specific heat c by the measurement of transient temperature distribution in the surface and center of an infinite plane wall in cooling process are presented in this paper. The error have been analyzed and computed. The results show that the expanded uncertainty of α,λ and c is within than 3%,5% and 7% respectively while the confidence probability is 95%.
出处
《计量学报》
CSCD
北大核心
2000年第4期273-278,共6页
Acta Metrologica Sinica
基金
南昌大学基础理论基金!(95 0 70 7)
