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内混合气溶胶粒子的有效吸收对激光大气传输有着不利影响。以黑碳和氯化钠两种典型成分为例,计算了密度和比热相同情况下,均匀球和分层球模型粒子的有效吸收系数。研究结果表明:有效吸收系数大小与粒子组分混合方式有关。在粒子吸收热量加热大气过程中,黑碳为核的粒子在可见光和近红外波段有效吸收系数更大;均匀球粒子在中红外波段和远红外波段(100μs后)有效吸收系数更大,而氯化钠为核的粒子在远红外波段(前100μs)有效吸收系数最大。
Effective absorption of mixed aerosol particles has an adverse effect on laser atmospheric transmission. Taking the two typical components of black carbon and sodium chloride as an example, the effective absorption coefficients of uniform spherical and stratified sphere model particles were calculated under the same density and specific heat. The results show that the effective absorption coefficient is related to the mixing mode of particle components. Particles with black carbon as nucleus have a larger effective absorption coefficient in the visible and near infrared bands when the particles absorb the heat and heat the atmosphere. The average effective absorption coefficient of the uniform spherical particles in the mid-infrared and far-infrared (100 μs) Particles with sodium as the nucleus have the largest effective absorption coefficient in the far infrared band (first 100 μs).