含内部结构的VLGC液舱内晃荡试验研究及数值模拟(英文)  

Experimental Study and Numerical Simulation of Sloshing in VLGC Tanks with Internal Structures

作　　者：蔡忠华[1] 王德禹[1] 李喆[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200030

出　　处：《船舶力学》2012年第12期1385-1393,共9页Journal of Ship Mechanics

摘　　要：文章对VLGC液舱模型内的晃荡做了数值及试验研究。装在液舱不同位置的5个压力传感器用于测量纵摇情况下晃荡对舱壁的冲击压力。同时建立了计算流体动力学的模型来模拟舱内的晃荡,采用基于RANS控制方程的标准κ-ε湍流模型,其中VOF法用于追踪自由表面,动网格技术用于更新计算网格。通过与试验压力时间历程的比较,验证了数值方法的有效性;数值研究了没有内部结构及有内部结构情况下的液舱模型,并且讨论了强肋框、水平桁及制荡舱壁对于压力及液舱内液体固有频率的影响。Liquid sloshing phenomena in a VLGC （Very Large Gas Carrier） tank were studied nu- merically and experimentally. The scale of the model tank was 1/45.5. Pitch motions were tested. For measuring impact pressures, five pressure sensors were installed. A computational fluid dynamics （CFD） model was developed to simulate the sloshing in the tank. The standard K-e turbulence model was based on the Reynolds-averaged Navier-Stokes （RANS） equations. The volume of fluid （VOF） method was used to predict free surface elevations. Dynamic mesh technique was used to update the volume mesh. Computations for pressure time histories and peak pressures were compared with ex- perimental results. The comparison shows that they agree well with each other. The tanks with and without internal structures were studied numerically. The effects of frame rings, horizontal griders and wash bulkheads on the impact pressures and natural frequencies of the fluid in the tank were also discussed.

关 键 词：晃荡 冲击压力 实验 内部结构 

分 类 号：U661.73[交通运输工程—船舶及航道工程]