相干散射的非吸收粒子辐射计算搭接  

Study on Overlapping Model for Computational Thermal Radiative Transfer of Non-Absorbing Particle With Coherent Scattering

作　　者：谢鸣[1] 杨柳[1] 艾青[1] XIE Ming;YANG Liu;AI Qing(School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《工程热物理学报》2018年第7期1538-1541,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51776052;No.51676055);航空科学基金项目(No.20162777012)

摘　　要：针对非吸收性光学厚纤维材料中光谱辐射传输,考虑高密度粒子分布下粒子间相互干扰对光谱辐射传输计算域搭接过程的影响,建立了光谱辐射整体传输计算的搭接模型。采用时域有限差分(FDTD)计算得到单个非吸收性纤维粒子的辐射性质为基础参数,基于数值仿真分析了2～5μm波长下材料厚度、纤维粒子间隔、排列方式对材料宏观透过率的影响。通过比较不同搭接域的计算结果与真实值的差异,发现非吸收纤维对光谱辐射的反射集中在材料入射面附近区域,并且搭接模型对错序排列的纤维材料适用性更好。Aiming at the spectral radiation transmission in non-absorbing optical thick fiber materials, considering the influence of interparticle mutual interference in high-density particles on the overlapping process of spectral radiation transmission can overlapping model of total transmission calculation of spectral radiation was established. The radiation properties of a single non-absorbent fiber were calculated by finite difference time domain（FDTD）. Based on numerical simulation, the effects of material thickness, fiber spacing and arrangement on the macroscopic transmittance of the material at 2-5 μm wavelength are analyzed. By comparing the differences between calculated results and the real values of different overlapping domains, it is found that the reflection of spectral radiation by non-absorbed fibers is concentrated in the vicinity of the incident surface of the material, and the overlapping model is more suitable for the cross fiber materials.

关 键 词：光谱辐射 搭接模型 非吸收纤维 时域有限差分 

分 类 号：TK123[动力工程及工程热物理—工程热物理]