壁面结构形状对流体晃荡影响的数值研究  

Numerical simulation of the influence of wall structure shape on liquid sloshing

作　　者：卫志军 杜祥璞 邹国良[3] 吴锤结[2] 翟钢军[1] WEI Zhi-jun;DU Xiang-pu;ZOU Guo-liang;WU Chui-jie;ZHAI Gang-jun(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116023,China;School of Aeronautics and Astronautics,Dalian University of Technology,Dalian 116023,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116023 [2]大连理工大学航空航天学院,辽宁大连116023 [3]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,南京210029

出　　处：《船舶力学》2021年第9期1189-1202,共14页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(11602051,51779040);中国博士后科学基金资助项目(2016M591433);辽宁省自然基金资助项目(20170540151);中央高校基本科研基金资助项目(DUT19RC(3)023)。

摘　　要：为了合理抑制流体晃荡的问题,考虑空气可压缩性,通过系统对比不同激励频率下,三种壁面结构形状对晃荡荷载、近壁面波高、流场密度和湍动能的影响,探明壁面结构形状抑制流体晃荡的机理。结果表明:壁面凸起结构改变了流体砰击模式,进而影响了晃荡荷载分布及其作用时间;壁面凸起结构能增加湍流强度,提高能量耗散,从而降低流体对舱壁的冲量,有效抑制流体对结构的持续作用。因此,合理设计的壁面凸起结构形状可以有效降低晃荡荷载冲量,从而有效抑制流体晃荡。To suppress liquid sloshing,considering the compressibility of air,this paper numerically analyzes the effects of three different wall structure shapes on the sloshing load,the wave height near the wall,the density of the flow field and the turbulent kinetic energy subjected to three different excitation frequencies.The mechanism of wall structure shape suppressing liquid sloshing is investigated.The results show that the wall structure changes the slamming mode,and consequently affects the distribution of sloshing load and its duration time.The wall structure can increase the turbulence intensity and energy dissipation.Thus,the impulse of liquid slamming on the wall is reduced and the effect of the liquid slamming on the structure is effectively suppressed.Therefore,the reasonable design of the wall structure shape can effectively reduce the impulse of sloshing load and suppress sloshing.

关 键 词：抑制流体晃荡 空气可压缩性 壁面凸起结构 晃荡荷载 冲量 

分 类 号：U661.3[交通运输工程—船舶及航道工程]