云雾场多尺度水滴和冰晶粒子的脉冲激光后向散射特性  

Pulsed laser backscattering characteristics of multi-scale water droplets and ice crystal particles in cloud field

作　　者：郭婧[1,2] 朱海婷 刘宁 Guo Jing;Zhu Haiting;Liu Ning(School of Internet of Things,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Key Laboratory of Icing and Anti/De-icing,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]南京邮电大学物联网学院,江苏南京210003 [2]中国空气动力研究与发展中心结冰与防除冰重点实验室,四川绵阳621000

出　　处：《南京理工大学学报》2023年第3期359-364,共6页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(52105553);结冰与防除冰重点实验室开放课题(IADL20190105)。

摘　　要：为研究云层中冰晶和水滴粒子的尺度、散射等光学特性对飞行结冰的影响,该文基于联合散射理论,建立多尺度水滴和冰晶粒子的激光后向散射模型,分析了水滴与冰晶粒子的光学特性对后向散射的影响。结合工程应用模拟云雾场实验环境,测试不同粒子浓度下的1.064μm和0.532μm激光后向散射。结果表明,随着云粒子浓度增加,云层后向散射发光强度增大,实测数据与理论数据最大误差不高于7%。0.532μm波长激光的后向散射功率明显高于1.064μm波长激光,云雾场后向散射与粒子浓度几乎呈线性增长,并且冰云的后向散射系数普遍高于水云,差异可达到2~30倍。To research the influence of the scale,scattering and other optical properties of ice crystals and water droplets in clouds on the freezing area and shape of aircrafts,the optical backscattering model of multi-scale non-spherical water droplets and ice crystal particles is established based on the superimposed scattering theory,and the influences of optical characteristics of water droplets and ice crystal particles on backscattering are analyzed.The laser backscattering of 1.064μm and 0.532μm at different particle concentrations is tested in a simulated cloud field experimental environment.The results show that with the increase of cloud particle concentration,the backscattering intensity of cloud increases,and the maximum error between the measured data and the theoretical data is not more than 7%.The laser backscattering power of 0.532μm wavelength is obviously higher than that of 1.064μm,the backscattering and particle number concentration of cloud field almost increase linearly,and the backscattering coefficient of ice cloud is generally higher than that of water cloud,the difference can reach 2~30 times.

关 键 词：云雾场 水滴 冰晶 脉冲 激光后向散射 粒子浓度 冰云 水云 

分 类 号：TN241[电子电信—物理电子学]