拉曼方法同时测量单根碳纤维热物性和对流传热系数

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

化工学报 ›› 2014, Vol. 65 ›› Issue (S1): 251-257.DOI: 10.3969/j.issn.0438-1157.2014.z1.041

拉曼方法同时测量单根碳纤维热物性和对流传热系数

胡玉东, 刘锦辉, 王海东, 张兴

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

收稿日期:2014-02-10 修回日期:2014-02-17 出版日期:2014-05-30 发布日期:2014-05-30
通讯作者: 张兴
基金资助:
国家自然科学基金项目（51327001）。

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

Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Received:2014-02-10 Revised:2014-02-17 Online:2014-05-30 Published:2014-05-30
Supported by:
supported by the National Natural Science Foundation of China (51327001).

摘要/Abstract

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。

关键词: 微尺度, 碳纤维, 激光, 拉曼, 热传导, 热导率, 接触热阻, 对流

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^-1by 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.

Key words: microscale, carbon fiber, laser, Raman, heat conduction, thermal conductivity, thermal contact resistance, convection

中图分类号:

TK124

胡玉东, 刘锦辉, 王海东, 张兴. 拉曼方法同时测量单根碳纤维热物性和对流传热系数[J]. 化工学报, 2014, 65(S1): 251-257.

HU Yudong, LIU Jinhui, WANG Haidong, ZHANG Xing. Simultaneous measurement of thermal properties and convective heat transfer coefficient of individual carbon fiber using Raman spectroscopy[J]. CIESC Journal, 2014, 65(S1): 251-257.

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拉曼方法同时测量单根碳纤维热物性和对流传热系数

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

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