基于TPS法简化模型测量物质导热系数

发布时间：2018-01-13 07:34

本文关键词：基于TPS法简化模型测量物质导热系数　出处：《纳米技术与精密工程》2017年04期 　论文类型：期刊论文

【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]:In this paper, the transient plane source (TPS) based on the principle of measuring the thermal conductivity of the material, integral solution for the temperature rise of probe Bethel function model in complex problem, fixed parameter square probe simplified model in document [9], a circular probe which is applicable to the provisions of the international standard TPS method. Error analysis shows that the model and the original the two model, the correlation between them is very good, can replace the original calculation model of thermal conductivity, integral operation efficiency and the operation efficiency was higher than that of the Bethel polynomial function. The simplified model based on the standard of thermal physical properties of austenitic stainless steel and Pyroceram 9606 at room temperature, atmospheric pressure thermal conductivity were measured. Results show that the error of the measurement results and the standard value is 2.1% and 1.8% respectively, verify the validity of the model.

【作者单位】：精密测试技术及仪器国家重点实验室(天津大学);
【分类号】：O551.3
【正文快照】： 导热系数是物质重要的传递性质之一,是衡量物质导热性能的重要参数.在新能源的开发、半导体材料研究和农产品的储藏与加工等方面,物质导热系数的测量都是必不可少的[1-3].导热系数的测量方法主要有稳态法和瞬态法两大类.稳态法测量原理简单、实验时间长,需要进行多点温度测量,

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