|本期目录/Table of Contents|

基于TPS法简化模型测量物质导热系数(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2017年4期
页码:
323-327
栏目:
精密测量
出版日期:
2017-07-15

文章信息/Info

Title:
Thermal Conductivity Measurement Based on Simplified Model of TPS Method
作者:
丰正功 李艳宁
精密测试技术及仪器国家重点实验室(天津大学), 天津300072
Author(s):
Feng Zhenggong Li Yanning
State Key Laboratory of Precision Measuring Technology and Instruments(Tianjin University),Tianjin 300072, China
关键词:
导热系数 热扩散率 瞬态平面热源法 热传递
Keywords:
thermal conductivity thermal diffusivity transient plane source method heat transmission
分类号:
TP216
DOI:
10.13494/j.npe.20150070
文献标识码:
A
摘要:
本文基于瞬态平面热源(TPS)法测量物质导热系数的原理,针对探头温升模型中贝瑟尔函数的积分运算求解复杂的问题,修正了文献[9]中方形探头简化模型的参数,使其适用于TPS法国际标准规定的圆形探头.该模型和原有模型的误差分析表明,二者具有很好的相关性,可以替代原有模型进行导热系数的计算,而且多项式的运算效率明显高于贝瑟尔函数的积分运算效率.基于该简化模型,针对热物理性能标准材料奥氏体不锈钢和Pyroceram 9606在常温、常压下的导热系数进行了测量,结果表明,测量结果和标准值的误差分别为2.1%和1.8%,验证了该模型的有效性.
Abstract:
Based on the principle of transient plane source (TPS) method for thermal conductivity measurement , to deal with the complicated problem of Bessel function integral operation in the temperature rising model of the probe, this paper modifies some parameters of the simplified model of square probe proposed in Ref.[9], to make it applicable to the calculation of the circular probe which is used in the ISO files. The error analysis of the simplified model and original model shows good correlation between them. The simplified model can replace the original one for the calculation of thermal conductivity. And the efficiency of the arithmetic polynomial is significantly higher than the efficiency of integral operation of Bethel function. Based on the simplified model, the thermal conductivities of austenitic stainless steel and Pyroceram 9606 which are the standard materials of thermal properties are measured under atmospheric pressure. The results show that the standard error is 2.1% and 1.8%, respectively,which verified the validity of the proposed model.

参考文献/References

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备注/Memo

备注/Memo:
收稿日期: 2016-06-23. 作者简介: 丰正功(1990—),男,硕士研究生. 通讯作者: 李艳宁, 教授, yanningli@tju.edu.cn.
更新日期/Last Update: 2017-12-20