气泡尾流光束衰减测量中的复散射校正

鲁刚; 孙春生; 张晓晖

doi:10.3969/j.issn.1001-806.2012.04.014

气泡尾流光束衰减测量中的复散射校正

1.
南京理工大学机械工程学院, 南京210094;
2.
海军工程大学兵器工程系, 武汉430033

作者简介: 鲁刚(1970- ),男,高级工程师,博士研究生,主要从事激光探测方面的研究工作..

通讯作者: 张晓晖, zhangxiaohui505@vip.sina.com

中图分类号: O436.2

Multiple scattering correction to measurement of beam attenuation in bubble wakes

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2.
Department of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China

Corresponding author: ZHANG Xiao-hui, zhangxiaohui505@vip.sina.com

CLC number: O436.2

摘要: 为了分析复散射对气泡尾流衰减测量的影响,采用小角度辐射传输方程,引入了表征复散射效应强弱的校正因子,通过数值求解分析了典型的尾流气泡尺度分布和数密度条件下复散射校正因子与接收视场角、光学厚度、光束大小和接收截面大小等参量之间的关系。结果表明,接收视场角在前向小角度范围内的变化对复散射校正因子的影响很大,而视场角较大时对复散射校正因子的影响基本相同;光学厚度的变化对复散射校正因子的影响显著,且在光学厚度小于1时,影响更明显;接收截面大小的变化在光学厚度小于1时对复散射校正因子的影响很小,但在光学厚度较大时,对复散射校正因子的影响比较明显;光束大小的变化对复散射因子的影响相对较小,且在光束束腰较大时对复散射因子的影响基本不变。该研究为尾流光束衰减测量条件的选择和优化提供了理论依据。
- 物理光学 /
- 复散射校正 /
- 辐射传输方程 /
- 光束衰减 /
- 气泡尾流
Abstract: For analyzing the influence of multiple scattering on measuring beam attenuation in bubble wakes,the correction coefficient was introduced which denotes the extent of multiple scattering,and its theoretical formulations was derived by means of a narrow angle approximation solution to the radiation transfer equation.Given a typical bubbles size distribution function and number density in bubbles wakes,the relation among the correction coefficient and detector field of view(FOV),wake optical depth,beam size,received section size were analyzed by numerical calculation.Analysis shows that the influence of FOV in forward small angle on the correction coefficient is great,but it has a little change when the FOV is wide;and the impact of optical depth on the correction coefficient is prominent,besides the impact is more prominent when the optical depth is less than 1;and the effect of received section size on the correction coefficient is very little when depth is less than 1,but it becomes visible as the optical depth increase;the influence of beam size on the correction coefficient is comparatively less,further the correction coefficient almost keeps changeless when the beam size is large.The research proposes a theoretical foundation for choice and optimization of conditions during measuring beam attenuation in bubble wakes.
- physical optics /
- multiple scattering correction /
- radiative transfer equation /
- beam attenuation /
- bubble wake

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气泡尾流光束衰减测量中的复散射校正

作者简介: 鲁刚(1970- ),男,高级工程师,博士研究生,主要从事激光探测方面的研究工作..

通讯作者: 张晓晖, zhangxiaohui505@vip.sina.com

Multiple scattering correction to measurement of beam attenuation in bubble wakes

Corresponding author: ZHANG Xiao-hui, zhangxiaohui505@vip.sina.com

计量

气泡尾流光束衰减测量中的复散射校正

通讯作者: 张晓晖, zhangxiaohui505@vip.sina.com

作者简介: 鲁刚(1970- ),男,高级工程师,博士研究生,主要从事激光探测方面的研究工作.

English Abstract

Multiple scattering correction to measurement of beam attenuation in bubble wakes

Corresponding author: ZHANG Xiao-hui, zhangxiaohui505@vip.sina.com

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留言板

气泡尾流光束衰减测量中的复散射校正

作者简介: 鲁刚(1970- ),男,高级工程师,博士研究生,主要从事激光探测方面的研究工作..

通讯作者: 张晓晖, zhangxiaohui505@vip.sina.com

Multiple scattering correction to measurement of beam attenuation in bubble wakes

Corresponding author: ZHANG Xiao-hui, zhangxiaohui505@vip.sina.com

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气泡尾流光束衰减测量中的复散射校正

通讯作者: 张晓晖, zhangxiaohui505@vip.sina.com

作者简介: 鲁刚(1970- ),男,高级工程师,博士研究生,主要从事激光探测方面的研究工作.

English Abstract

Multiple scattering correction to measurement of beam attenuation in bubble wakes

Corresponding author: ZHANG Xiao-hui, zhangxiaohui505@vip.sina.com

全文HTML

目录