摘要
基于CFD技术,提出了数值预报LNG船薄膜型液舱晃荡压强的方法。流体运动方程由不可压缩的连续方程和N-S动量方程描述,并采用有限体积法进行离散,通过Simple算法求解,其中液体自由表面运动采用VOF技术进行追踪并重构。在中国船舶科学研究中心,以1:55的液舱试验模型为研究对象,开展了试验研究。数值预报结果与试验结果进行了比较,结果显示测点处的压力时间历程与自由液面波形与试验值相当吻合,说明所建立的数值模型可以有效地预报LNG船液舱晃荡载荷。
A numerical technique to predict the pressure induced by liquid sloshing in a membrane tank is produced for LNG carrier based on CFD. The motion of incompressible fluid is described by Navier-Stokes equations and continuum equation. The governing equations are discretized by finite volume method and solved by Simple scheme. The profile of liquid surface is reconstructed by the volume of fluid （VOF） tech- nique. A reduced scale （1：55） tank model is used to perform the model test in China Ship Scientific Re- search Center. The numerical results including pressure and free surface profile are compared with the test ones, showing a good agreement. These comparisons show that the presented method is useful to predict the load induced by liquid sloshing for LNG carrier.
出处
《船舶力学》
EI
CSCD
北大核心
2013年第1期42-48,共7页
Journal of Ship Mechanics
基金
国家自然科学基金资助项目(10472032
50879030
51179077)
江苏高校优势学科建设工程资助项目
关键词
液体晃荡
LNG船
数值模拟
模型试验
liquid sloshing
LNG carrier
numerical simulation
model test
