摘要
应用Monte-Carlo法计算圆锥形黑体空腔的有效发射率,并与有限元方法进行了对比。分析了腔体的几何参数、材料发射率、探测器距腔口距离等因素对黑体腔有效发射率的影响。结果表明:两种分析方法得到的结果基本相同,即腔体长度与腔体半径比为6,开孔半径和腔体半径比为0.5,圆锥角度≥90°,材料发射率≥0.5,探测器到腔口距离达到腔体半径为15倍时,圆锥形黑体腔有效发射率较大。
Effective emissivity of the conical blackbody cavity is calculated by Monte-Carlo method, the method is compared with the finite element method. The influence of some factor, such as the geometrical parameters, the emissivity of the material and the distance from the cavity, on the effective emissivity of the blackbody cavity is analyzed. It indicates that the results obtained by the two methods are essentially same, that is, the ratio of cavity length to cavity radius is 6, the opening radius to cavity radius is 0. 5, the cone angle is greater than or equal to 90° , the material emissivity is greater than equal to 0. 5, the distance from the detector to the cavity is 15 times as large as the cavity radius. At the same time, when all the conditions above are satisfied, the effective emissivity of the conical blackbody cavity is large.
作者
沈久利
邢婷婷
吴飞
SHEN Jiu-li, XING Ting-ting, WU Fei(School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, Chin)
出处
《计量学报》
CSCD
北大核心
2018年第3期359-362,共4页
Acta Metrologica Sinica
基金
国家自然科学基金(51675469)
