舰船尾迹浊度计算方法

摘要

The relation between turbidity, light extinction coefficient and bubble number density is presented. The calculating method of ship wakes' turbidity and an example are given. The bubble's light extinction coefficient of different ship wake area is numerically simulated with the Mie scattering theory. According to the law of bubble number density varying with bubble diameter and the ship wake depth, bubble diameter distribution model of ship wake is presented. Simulation result shows the turbidity and the light extinction of ship wake are increased along the ship stern from far to center and from deep to shallow. It is a common method when calculating the ship wakes' turbidity.%阐述了尾迹的浊度、消光系数及尾迹气泡数密度之间的关系,研究了尾迹浊度的计算方法,并给出1个计算实例.利用单个气泡的Mie散射理论,对尾迹不同直径气泡的消光系数进行求解.根据舰船尾迹中不同直径气泡数密度随深度的变化规律,以及尾迹各区域的气泡直径分布,建立了尾迹气泡直径分布模型.计算实例表明:尾迹深度越大,其浊度越小,尾迹对光线衰减能力越小.尾迹中心处浊度最大,尾迹对光线的衰减作用最强.该计算方法具有通用性.