化工学报 ›› 2019, Vol. 70 ›› Issue (S2): 70-75.doi: 10.11949/0438-1157.20190550

• 热力学 • 上一篇    下一篇

脉冲式平面热源法测量材料热导率和热扩散率的分析与实验

于帆(),张欣欣   

  1. 北京科技大学能源与环境工程学院,北京100083
  • 收稿日期:2019-05-22 修回日期:2019-06-05 出版日期:2019-09-05 发布日期:2019-11-07
  • 通讯作者: 于帆 E-mail:fanyu@me.ustb.edu.cn
  • 作者简介:于帆(1964—),男,博士,教授,fanyu@me.ustb.edu.cn

Analysis and experiments of measuring thermal conductivity and diffusivity of materials by plane source-pulse transient method

Fan YU(),Xinxin ZHANG   

  1. School of Energy & Environmental Engineering, University of Science and Technology Beijing, Beijing 100083,China
  • Received:2019-05-22 Revised:2019-06-05 Online:2019-09-05 Published:2019-11-07
  • Contact: Fan YU E-mail:fanyu@me.ustb.edu.cn

摘要:

对于脉冲式平面热源法实验中的脉冲加热持续时间对测量的影响以及热参数计算公式中的f系数做了理论分析,建立了相应的实验装置并对一些常见材料进行实际测量,系统分析了热导率和热扩散率以及体积热容测试的不确定度。

关键词: 测量, 热传导, 传热, 热导率, 热扩散率, 脉冲式平面热源法

Abstract:

The influence of pulse heating duration on measurement and the f coefficient in the formula for calculating thermal parameters in the experiment of plane source-pulse transient method are theoretically analyzed. The corresponding experimental apparatus is established and some commonly used materials are measured in practice. The uncertainty of thermal conductivity, thermal diffusivity and volume heat capacity measurement are systematically analyzed.

Key words: measurement, heat conduction, heat transfer, thermal conductivity, thermal diffusivity, plane source-pulse transient

中图分类号: 

  • TK 311

图1

脉冲式平面热源法原理示意图"

图2

热参数计算公式中的系数f随p的变化关系"

图3

脉冲时间对温升曲线的影响"

图4

脉冲式平面热源法实验装置示意图"

表1

脉冲式平面热源法测量结果"

材料试样 λ /(W/(m·K)) a/(m2/s) ρ c /(J/(m3·K))
纤维复合材料XW1 0.04904 1.469×10-7 3.338×105
工程塑料ABS2 0.1704 1.271×10-7 1.341×106
有机玻璃YB3 0.1952 1.127×10-7 1.732×106
大理石板DS4 2.928 1.361×10-6 2.151×106

图5

有机玻璃试样的脉冲加热温度响应曲线"

表2

热参数测量不确定度分量计算结果"

不确定度计算项目 相对不确定度/% 类型
热通量 0.19 B
测温点距离 0.58 B
最大温升 1.4 B
最大温升时间 0.29 B
脉冲加热时间 0.58 B
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