摘要
对实验室模拟的尾流以及真实尾流气泡幕中气泡的运动规律进行了分析和计算 ,并提出了气泡幕中气泡随半径分布规律的数学物理模型 ,引入了最可几半径的概念 从单个气泡对激光散射的影响推导出了气泡幕对激光的散射效应的数学表达式 ,并利用所得到的表达方式在实验室条件下进行了相关计算 所建立的理论模型对于气泡分布的计算结果同实验结果相比 ,一致性相当好 在气泡幕对激光散射的影响中 ,首次对激光偏振化特性的影响进行了区别计算 计算结果表明 :激光的两种偏振化状态对气泡幕散射的影响从粗糙结构来看没有明显差异 ,但其精细结构有所不同 对不扩束和扩束两个条件下的计算明确显示出 ,扩束条件下散射光的强度是不扩束条件下的二倍以上 。
The movement law of bubbles in bubble film of simulated and real wakes is discussed and calculated in this paper,also the math physical model of bubble distribution in relation to bubble radius is predicted and for the first time,a new concept of the greatest probability radius is introduced.The math equations,for the laser scattering effect of film of bubbles,are derived from that of a single bubble.Calculation from the equations in laboratory condition corresponds with experimental results rather perfectly.Polarizations are considered in the calculation of the scatted intensities respectively.Derivations show that,in the effect of polarization on scattering,there is little difference in rough structure and some differences in fine structure.Besides,calculation for normal and expanded beams reveals that the scattered intensity of expanded beam is above two times than one of normal bean but there is no difference in fine structure.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2002年第8期1032-1036,共5页
Acta Photonica Sinica
基金
国防科技重点实验室基金试点项目 (项目编号 :99JS2 6 3 1 ZK180 1)
