基于真实海洋环境的舰船近程气泡尾流数值模拟  

Numerical Simulation of Bubbly Flow around a Ship with Modeling Real Nuclei Field

作　　者：乔亚腾 傅慧萍[1] 李杰[1] QIAO Yateng;FU Huiping;LI Jie(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《中国造船》2020年第3期88-94,共7页Shipbuilding of China

摘　　要：基于欧拉双流体模型和相群平衡模型建立了真实海洋环境下的舰船近程气泡尾流数值模拟方法,对舰船驶过时海洋背景场中生成更大气泡的可能性进行研究,以了解舰船近程尾流中气泡的空间分布特征,为声学和光学探测舰船尾流提供依据。研究表明:舰船航行会显著增加舰船周围自由面的气泡空隙率,使海洋背景场中自由面上的空隙率增加到2倍以上。大气泡主要集中在舰船的表面,体积分率可达85%;自由面上小气泡的数密度最高。原海洋背景场中不存在的大气泡将主要在壁面生成,自由面上也有少部分生成。Bubbly flow around a ship was numerically simulated based on the Eulerian method and a discrete population balance model.The possibility of generation of big bubbles with diameters greater than that in the background ocean,was researched.The results show that the void fraction on the free surface around the ship will increase more than two times of that in the background ocean.Large bubbles are mainly concentrated on the surface of the ship,and the volume fraction can reach 85%,while the number density of small bubbles on the free surface is the highest.Large bubbles,which do not exist in the original ocean background field,will be generated mainly on the wall,and a little on the free surface.

关 键 词：相群平衡模型 舰船气泡尾流 海洋背景气泡 

分 类 号：O359.1[理学—流体力学]