光致气溶胶粒子加热的等效吸收系数  

EFFECTIVE ABSORPTION OF AEROSOL HEATED BY LASER

作　　者：刘炎焱[1] 王俊波[1] 乐时晓[1] 杨小丽[1] 林为干[1] 

机构地区：[1]电子科技大学应用物理研究所,成都610054

出　　处：《强激光与粒子束》1993年第4期540-544,共5页High Power Laser and Particle Beams

基　　金：国家863激光技术领域的资助

摘　　要：当激光加热气溶胶粒子,所有气溶胶粒子都将吸热,部份吸收的热量将储存在内部构成一个热阱;部分加热周围空气,改变周围空气的温度分布。本文将现有连续激光加热单个气溶胶粒子热晕的理论引入群体气溶胶粒子,建立了群体气溶胶粒子加热空气的等效吸收系数公式,计算了不同类型的粒子的等效吸收系数以及延迟时间。Thermal blooming induced by aerosol is discussed in laser beam propagation though atmosphere. We give the effective absorption coefficient aeff(t). Because of the limited conductivity of air, the increment of temperature of air heated by aerosol absorbing energy from laser beam is imhomogeneous, which lead to the aeff(t) dependent on time. The delay time tp , when the αpff(t)arrives at the maximum value, is dependent on the radius of aerosol.

关 键 词：等效吸收系数 气溶胶 激光加热 

分 类 号：TN241[电子电信—物理电子学]