可压缩混合层流场光学效应分析与实验研究  

Theoretical and experimental investigation on aero-optical effect for a compressible mixing layer

作　　者：甘才俊[1] 李烺[1] 马汉东[1] 熊红亮[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《物理学报》2013年第18期302-307,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2009CB724105)资助的课题~~

摘　　要：利用量级分析和风洞实验研究了末制导光学外冷窗口典型流动(可压缩混合层流动)气动光学效应的规律性.理论分析主要针对视线误差(boresight error,BSE)与混合层流场特征参数之间的关系进行了讨论.研究结果表明:在可压缩混合层中影响时均BSE的特征参数主要有对流马赫数、雷诺数、自由流与混合层界面剪切应力、自由流速度比和密度比等因素;采用细光束穿越混合层流场的风洞试验结果主要证实了时均BSE与对流马赫数之间的关系.Using dimensional analysis and experimental technique, the aero-optical effect for a compressible mixing layer around optical side window is investigated. According to the theoretical analysis, we find that time-averaged boresight error increases with the increase of convective Mach number （Mc）. Moreover, we also present the relations between time-averaged boresight error （BSE） and Reynolds number, shear stress at interface between mixing layer and free stream, free stream velocity ratio and density ratio. The experimental results from a thin beam light passing through compressible mixing layer verify the theoretical result between time-averaged BSE and Mc.

关 键 词：气动光学效应 可压缩混合层 对流马赫数 

分 类 号：O436[机械工程—光学工程]