瞬态平面热源法测量材料导热系数

基金项目:

国家自然科学基金资助项目(50776009)

详细信息

Thermal conductivity measurement of materials based on a transient hot-plane method

School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要: 为了提高瞬态平面热源法的适用温度,介绍了瞬态平面热源法的测量原理.根据有限元法模拟了无膜平面热源加热过程中试样的温度分布,建立了相应的实验装置,测量了环境温度为27~829℃时材料的导热系数和热扩散率.结果表明在较高温度下该方法测量材料热导率是有效的,可用于实际测量.
- 热传递 /
- 导热系数 /
- 热扩散率 /
- 测量 /
- 数值分析
Abstract: The measurement principle of a transient hot-plane method was introduced to improve the service temperature of the method. The sample temperature distribution of a filmless plane heat source during heating process was simulated based on the finite element method. The experimental apparatus was established and practical measurements for the thermal conductivity and thermal diffusivity of materials were made at an environment temperature of 27 to 829℃. The results show that the transient hot-plane method is effective for measuring the thermal conductivity of materials in a high temperature environment, which is applicable to actual measurements.
- heat transfer /
- thermal conductivity /
- thermal diffusivity /
- measurements /
- numerical analysis