组合阵列相干声源激发局部大气不均匀体分布特性研究  

Study on Distribution Characteristics of Local Atmospheric in Homogeneities Excited by Combined Array Coherent Sound Sources

作　　者：王明军[1,2] 席建霞 王文静 WANG Mingjun;XI Jianxia;WANG Wenjing(School of Automation and Information Engineering,Xi’an University of Technology,Shaanxi,Xi’an,710048 China;Shaanxi Civil-Military Integration Key Laboratory of Intelligence Collaborative Networks,Shaanxi,Xi’an 710126,China)

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]陕西省智能协同网络军民共建重点实验室,陕西西安710126

出　　处：《光散射学报》2022年第3期222-230,共9页The Journal of Light Scattering

基　　金：国家自然科学基金重大研究计划培育项目(92052106);国家自然科学基金(61771385);陕西省杰出青年科学基金(2020JC-42);固体激光技术重点实验室开放基金(6142404190301)。

摘　　要：声波作为具有能量的机械波,在传播过程中与大气相互作用,扰动大气湍流的时空分布特性。本文基于声波的波动方程和叠加原理,结合大气折射率与大气物理参数的关系式,通过理论建模和仿真模拟,数值分析了基于单个点阵列相干声源的五种不同类型组合阵列相干声源模型激发的人工折射率不均匀体分布情况。结果表明:组合阵列声源在局部空间平面上激发的不均匀体分布特征受阵列声源的数量和分布位置共同影响,组合阵列模型内部声源个数越多,激发出的人工不均匀体的数量级以及起伏更大,同时声波之间的干涉条纹也更加的明显。本文为生成或抑制湍流效应提供了新思路,数值计算结果可为光工程选择合适的声源模型提供依据。As mechanical waves with energy,acoustic waves interact with atmospheric physical parameters during propagation,disturbing the spatial and temporal distribution characteristics of atmospheric turbulence.Based on the wave equation and superposition principle of sound waves,combined with the relationship between atmospheric refractive index and atmospheric physical parameters,this paper analyzes the excitation of a single point array sound source and five different types of combined array coherent sound source models through theoretical modeling and numerical simulation.Artificial refractive index inhomogeneity distribution.The results show that the distribution characteristics of the inhomogeneous body excited by the combined array sound source on the local space plane are affected by the number and distribution position of the array sound source.The larger the order of magnitude,the stronger the ups and downs.This paper provides a new idea for generating or suppressing turbulent effects,and the numerical calculation results can provide a basis for selecting appropriate sound source models in optical engineering applications.

关 键 词：组合阵列声源 点阵列声源 人工不均匀体 折射率 

分 类 号：O521.23[理学—高压高温物理]