基于几何光学的泡沫滴/水滴光散射计算模型

为深入研究舰船泡沫 水两用幕的光衰减机理，建立了基于几何光学的泡沫滴/水滴光散射强度分布计算模型。利用该模型对液相折射率m2为1.20至1.50范围内、气泡相对半径r为0至0.99的球状泡沫滴和水滴、散射角为1至10内的光散射强度进行了数值计算。结果表明，泡沫滴/水滴对可见光具有强烈的散射作用，内的散射强度与入射光强度之比T随的增大而提高，最高可增加2个数量级；随m2的增大而降低，m2从1.30至1.40变化，T降幅最高达11.6%；随r的增加先下降而后提高，达到最低0和最高80.8%；T最低值对应的最优气泡半径ro随m2的降低和的增大而提高，从0.1最多增至0.4。该结论可为舰船泡沫 水两用幕技术的发展提供必要的理论基础。

Geometrical optics based light scattering computational model for foam/water drop

For the purpose of studying light attenuation principle of warship foam-water dual-purpose curtain, the visible light scattering model was established for calculating the optical scattering intensity distribution based on geometrical optics. Light intensity scattered by spherical foam/water drop restricted by scattering angle τ from 1° to 10°, relative bubble radius r from 0 to 0.99 and liquid refractive index m2 within 1.20 to 1.50 was calculated using the computational model above. Results show that light is scattered strongly by the foam/water drop. The ratio of scattering intensity to incident intensity Tτ increases by at most 2 orders of magnitude along with the increase of τ from 1°to 10°. Tτ reduces up to 11.6% along with the increase of m2 from 1.30 to 1.40. Tτ firstly declines and then increases to the extent of 0(minimum) and 80.8% (maximum) with the increase of r. The optimized bubble radius ro, corresponding to the lowest Tτ value, enlarges from 0.1 to 0.4 with the increase of scattering angle and the decrease of liquid refractive index. The research can provide theoretical foundation for the development techniques of warship foam-water dual-purpose curtain.