MATLAB耐高温陶瓷材料辐射率测量试验研究
关键字 耐高温陶瓷 辐射率 散射
Title Investigation on measurement experiment of emissivity of high-temperature-resistance ceramic samples
Abstract
This research is a contribution to the emissivity calculation of
high-temperature-resistance ceramic. Mathematical-physical model of heat
transfer process in high-temperature-resistance ceramic is set up based
on the internal physical properties of high-temperature-resistance
ceramic，by using thermal radiation transfer equation,thermal radiation
energy equation and the one-dimensional regional discrete method. The
emissivity is solved by using finite difference method and iterative
computation. MATLAB is used in this research. Three different programming
methods is presented. To verify the accuracy of the program solution,
related data of zirconia sample is used. The effect of changing emissivity
of the bottom, refractive index and thickness of the sample to the
emissivity calculation is also explored.
Key words High-temperature-resistance ceramic Emissivity Scattering
目 次
1 引言 1
1.1 课题研究背景及意义 1
1.2 耐高温陶瓷材料辐射率测量研究概况 1
1.3 本文主要研究工作 4
2 耐高温结构陶瓷的物理模型 5
2.1 耐高温结构陶瓷内部结构特性与基本假设 5
2.2 热辐射相关方程 6
2.3 耐高温结构陶瓷的物理模型 7
3 耐高温结构陶瓷的数学模型及计算 . 10
3.1 热辐射传递方程的处理——二热流法 . 10
3.2 耐高温结构陶瓷的数学物理模型 . 11
3.3 离散计算方法——有限差分法 . 13
3.4 针对研究模型的三种计算方法 . 14
3.5 计算程序简介 . 18
4 结果及讨论 . 20
4.1 程序准确性验证 . 22
4.2 探究样品下表面辐射率对辐射率计算的影响 . 25
4.3 探究样品折射率对辐射率计算的影响 . 25
4.4 探究样品厚度对辐射率计算的影响 . 26
4.5 探究差分次数对辐射率计算的影响 . 28
5 总结与展望 . 30
致谢 31
参考文献 32
符号表
E （半球总）辐射力，
h 对流换热系数，
I 辐射强度,
k 热导率,
Q 辐射热流量，w