舰船远程尾流气泡群的前向光散射特性研究

利用Mie理论计算了舰船尾流气泡群的归一化体散射函数和散射能量分布函数,分析了尾流气泡群的前向光散射特性。计算和分析结果表明,气泡群的前向散射光强度远大于后向散射,前向散射能量占总散射能量的90%以上;散射能量分布函数在小于1°的前向小角度散射角范围内迅速增加到40%以上,然后随散射角的增加缓慢增加;气泡表面附着的有机膜会显著地增强气泡群的后向散射,但对前向散射的影响不大。

Forward light scattering properties of bubble populations in ship far wakes

The normalized volume scattering function and energy distributing function of bubble populations in ship wakes are calculated by Mie theory,and based on which,the forward light scattering properties of bubble populations is analyzed.The results show that the forward scattering intensity of bubble populations is far stronger than its backscattering,and the forward scattering energy is above 90% of all scattering energy;the scattering energy in the small angle of forward 1 degree expands to beyond 40% rapidly,and then increases slowly with the scattering angle;the organic film coated to bubbles can enhance the bubbles' backscattering observably,but has a little influence on its forward scattering.