舰船主尺度参数对舰船气泡尾流几何特性的影响

为了解舰船主尺度参数对尾流中气泡分布的影响,为依据尾流特征识别舰船,激光、声探测舰船尾流以及鱼雷的尾流自导提供依据,采用热分层环境下舰船远场尾流中气泡数密度分布计算的数学模型.首先数值计算驱逐舰尾流中气泡数密度的衰减规律,并与实测结果进行比较,二者定性符合得较好.然后利用该模型数值计算3种典型舰船的气泡尾流几何分布特性,分析船长L、船宽B、吃水T、长宽比L/B以及长度吃水比L/T等舰船主尺度参数对气泡尾流长度、宽度、深度及横截面分布的影响规律.

The effect of the ship main scale parameter upon ship bubble wake geometry characters

The mathematics model which can calculate bubble number density distribution in ship’s far field wakes in the thermal stratified ocean environment are used for understanding the effect of the ship main scale parameter upon ship bubble wake geometry characters and providing the basis of identifying ship and detecting ship wakes by laser,sound and wake homing torpedo.First of all,the attenuation law of bubble number density in destroyer’s wakes are calculated using the model.The calculation results are compared with the measuring results of ship wakes,they agree well with each other qualitatively.Then,the bubble wake geometry distribution characters of three typical ships are calculated by the numerical simulation method.It analyzes the effect law of ship type parameters:ship length(L),ship width(B),sea gauge(T),L/B and L/T upon bubble wake length,width,depth,and cross section bubble distribution.