论文部分内容阅读
在研究物体的辐射特性时,需要用到物体表面的发射率等物性参数作为输入参数。实验测量发射率数据的适用范围受到一定限制,不能满足所有情况的数值仿真需要。从电磁波传播的基础理论着手,结合金属自由电子气模型,考虑光学参数的色散关系和空气入射到金属内折射角的复数关系,并在随机模拟金属粗糙表面的基础上,模拟并讨论了不同影响因素下实际金属表面的光谱发射率变化趋势。将本文的数值仿真与其他相关的实验和仿真数据进行对比,结果表明,该方法从本质理解并计算金属实际表面光谱发射率数值,结果可信,并具有普遍适应性。
When studying the radiation characteristics of an object, it is necessary to use physical parameters such as the emissivity of the surface of the object as input parameters. The experimental measurement of emissivity data is subject to certain limits, which can not meet the numerical simulation needs of all situations. Starting from the basic theory of electromagnetic wave propagation, taking the metal free electron gas model into account, taking into account the dispersion relationship of optical parameters and the complex relationship between the incident angle of air and the metal refraction angle, we simulate and discuss the different influences The change tendency of the spectral emissivity of the actual metal surface under the factor. The numerical simulation of this paper is compared with other relevant experimental and simulation data. The results show that this method can understand and calculate the real surface emissivity of metal from the nature, the result is credible and has universal adaptability.