基于相函数和消光因子的水雾粒子最佳消光半径研究

Study on Optimal Extinction Radius of Water Fog Particles Based on Phase Function and Extinction Factor

人造水雾可有效衰减红外辐射而广泛应用于目标红外隐身领域,获得最佳消光效果的水雾粒子半径分布区间成为国内外研究的重点和难点。在米氏(Mie)理论的基础上给出了粒子消光的物理和数学模型,总结了确定人造水雾最佳消光半径的三个条件,采用散射相函数和消光效率分析相结合的方法,经过Matlab编程计算分析了针对中、远红外波段的水雾粒子最佳消光半径,获得了较为明确的粒径分布区间,给出了中、远红外波段的最佳粒径分布规律。该结论可对舰船及陆路目标的红外隐身及消防灭火研究提供参考。

The infrared radiation could be effectively attenuated by the man-made water fog.For that the water fog particles have been greatly used in the fields of infrared stealth.Some radius distribution of the water fog particles could make the stealth effect be optimal,and that has become the emphasis and difficulty of studies.Based on Mie theory,the physical and mathematic models of the water fog particles extinction were given.Three qualifications used to ascertain optimal extinction radius of the man-made water fog were summed up.In the meantime,aimed at middle and far infrared bands the optimal extinction radius of water fog particles was calculated and analyzed by compiling Matlab programs in the method of scattering phase function and extinction factor.Explicit radius distribution of the water fog particles was got,and the rule of distribution of the optimal particles radius for middle and far infrared bands was given.This conclusion could offer references for studies such as stealth of warships and land targets and fire fighting.