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运用 Mie 散射理论,计算了粒径服从对数正态分布的水雾和雾状油(柴油)的质量消光系数及其在可见光、中红外和远红外波段的波段平均质量消光系数.研究了粒径分布参数对水雾和雾状油遮蔽性能的影响,结果表明当 r_0与被遮蔽(波段)波长接近且 b_0趋于1时,(波段平均)质量消光系数具有最大值.雾状油在以上三个波段的遮蔽性能优于水雾,且粒径分布一定时,雾状油和水雾对中红外波段的遮蔽作用优于远红外波段.
The Mie scattering theory was used to calculate the mass extinction coefficient and the average mass extinction coefficient in the visible, mid-infrared and far-infrared bands of water mist and mist oil (diesel) with particle size obeying the logarithm normal distribution. The results show that the mass extinction coefficient (band average) has the maximum value when r_0 is close to the wavelength of shaded (band) and b_0 tends to be 1. When the foggy oil is above The masking performance of the three bands is better than that of the water mist, and the masking effect of the mist oil and the water mist on the mid-infrared band is better than that of the far-infrared band when the particle size distribution is certain.