The flow characteristics around bridge piers under the impact of a ship  

作　　者：Yan-fen Geng Hua-qiang Guo Xing Ke 

机构地区：[1]School of Transportation,Southeast University,Nanjing,211189,China

出　　处：《Journal of Hydrodynamics》2020年第6期1165-1177,共13页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2018YFB1600400);the Jiangsu Province Transportation Science and Technology Project(Grant No.2018Y20).

摘　　要：The complicated flow structure around the pier threatens the safe navigation of ships.This paper studies the mechanism of the flow with a ship around the pier,passing or not passing and with consideration of the interval between the ship and the pier.The flow field model and the moving ship model are constructed by the six degrees of freedom(6DOF)solver combined with the virtual unit immersed boundary method and the level set method,both of which are based on the three-dimensional Navier-Stokes equations.The simulation results show that the ship significantly influences the flow around the pier,increasing the flow velocity by 50%to 140%.Away from the bridge pier,the cross-flow velocity decreases.The cross-flow velocity near the side of the pier also increases but in the opposite direction.The ship is affected by the negative yaw moment because of the reverse cross-flow between the pier and the ship.The size of the ship has an important impact on the extent of the affected flow areas but the velocity distribution is roughly in the same shape.The results show double impacts of ship and pier should be considered when determining the safe area of navigation.

关 键 词：Bridge pier flow around cylinder moving ship model 

分 类 号：O352[理学—流体力学]