基于Mie理论分析离散颗粒包裹尾喷流红外消光特性  

The IR Extinction Characteristic Research of Small Particles Enwrapping Exhaust Gas Based on Mie Theory

作　　者：张净玉[1] 常海萍[1] 么东升[1] 王慧元[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京江苏210016

出　　处：《红外技术》2007年第11期641-644,共4页Infrared Technology

摘　　要：针对离散颗粒红外消光特性,利用Mie理论开展最佳干扰(消光)粒径和最佳粒径下的颗粒浓度与透过率关系的研究,在此基础上结合某典型飞机喷流参数,从理论上探讨、分析了两种离散颗粒材料环高温尾喷流喷射后的红外透过率(3μm)。研究成果对于进一步选择、研究、制备低红外透过率的离散颗粒材料提供了一套有价值的理论预估评价方法。Both scattering and absorption remove energy from a beam of light traversing the medium, which is called extinction. Based on it, the IR can be suppressed by the small particles. First, the best particle diameter of the homogeneous spherical particle had been figured out based on the Mie theory and the Lambert-Beer theory. Then the relationship between mass concentration and transmissivity had been discussed with the best particle diameter. At last the IR （3 μ m） suppressing effect for the backward and sideward of aircraft＇s exhaust gas by two kinds of material had been analyzed theoretically.

关 键 词：红外辐射 消光特性 MIE理论 气溶胶离散颗粒 

分 类 号：TN219[电子电信—物理电子学]