Simultaneous measurement of thermal properties and convective heat transfer coefficient of individual carbon fiber using Raman spectroscopy

HU Yudong; LIU Jinhui; WANG Haidong; ZHANG Xing

doi:10.3969/j.issn.0438-1157.2014.z1.041

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Simultaneous measurement of thermal properties and convective heat transfer coefficient of individual carbon fiber using Raman spectroscopy

更新时间：2025-12-10

- Simultaneous measurement of thermal properties and convective heat transfer coefficient of individual carbon fiber using Raman spectroscopy
- CIESC Journal Issue S1, Pages: 251-257(2014)
- 作者机构：
  
  热科学与动力工程教育部重点实验室, 清华大学工程力学系,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.z1.041
  CLC： K124
- Online First：30 May 2014，
  
  Published：30 May 2014
- 稿件说明：
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HU Yudong, LIU Jinhui, WANG Haidong, et al. Simultaneous measurement of thermal properties and convective heat transfer coefficient of individual carbon fiber using Raman spectroscopy[J]. CIESC Journal, 2014, (S1): 251-257.
DOI：

HU Yudong, LIU Jinhui, WANG Haidong, et al. Simultaneous measurement of thermal properties and convective heat transfer coefficient of individual carbon fiber using Raman spectroscopy[J]. CIESC Journal, 2014, (S1): 251-257. DOI： 10.3969/j.issn.0438-1157.2014.z1.041.

摘要

主要完善并利用新近提出的激光拉曼测试方法，在333.15 K环境温度下测量了单根碳纤维的热导率（不考虑接触热阻），并与直流通电法测量结果进行比较，两者符合较好，验证了新提出的激光拉曼测量方法的可行性。同时激光拉曼方法还测量得到了接触热阻、碳纤维的激光吸收率及与空气的对流传热系数，并处理得到考虑接触热阻后修正的碳纤维真实热导率。

Abstract

The new developed laser-Raman method was used to measure the thermal conductivity of individual carbon fiber at 333.15 K. The local temperature along the individual fiber was determined by Raman shift. The measuring result without concerning thermal contact resistance is 110.6 W·m-1·K-1，which fits well with data from direct-current method. Then the method is made better. By changing laser heating spot

the thermal contact resistance is determined. And then the intrinsic thermal conductivity is determined to be 135.0 W·m-1·K-1 by concerning the thermal contact resistance. Moreover

by changing laser heating power the laser absorptivity is determined. And when the fiber is being heated in the air

the convective heat transfer coefficient is obtained by iterative solution.

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