为探索光尾流的探测和自导模式,研究了舰船远程尾流中气泡群的散射光能量分布特性。根据米氏理论推导了舰船尾流气泡群的光散射能量分布函数的计算公式,基于此公式对干净的尾流气泡群和覆盖着两种典型有机膜的脏尾流气泡群的能量分布函数进行了数值计算,得到了它们的能量分布特性。计算和分析结果表明,气泡群的前向光散射能量远大于后向散射,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较显著的增强气泡群的后向散射能量,但由于后向散射能量占总散射能量的比例很小,有机膜对前向散射能量的减小幅度不大。

The energy distribution properties of light scattered by bubbles in far ship wakes were studied to study the detection and homing mode of optical wakes. By means of Mie theory, the energy distribution function's expression of bubble populations was derived. Based on this derived formula, the energy distribution functions about clean bubbles and dirty bubbles coated with two mainly organic films were obtained by numerical calculation. The results show that the forward scattering energy of bubbles is far higher than that of backscattering, and occupies above 90% of all scattering energy; the scattering energy within forward 1° expands to beyond 40% rapidly, and then increases slowly with the scattering angle; the organic film coated to bubbles can enhance the bubbles’ backscattering energy significantly, but has little influence on its forward scattering energy.