摘要
采用有限体积法通过求解不可压缩的雷诺平均 (RANS)方程 ,数值模拟了包括兴波的三维船体周围的粘性流场 ,湍流模式使用了子网络尺度模式 (SGS)和 Baldwin- Lomax模式相结合的混合模式 .对于自由表面的处理 ,应用了任意拉格朗日 -欧拉方法 ,网格采用了不仅与物体表面贴体 ,而且与自由表面贴体的动网络 ,即随着自由表面的变化要不断重新划分网格 .虽然此方法需要很长的计算时间 ,但能较好地描述船体的兴波情况 .计算了系列 6 0船模在 Fn=0 .3 1 6 ,Re=1 .9× 1 0 6时带自由面的粘性流场 ,计算结果与试验结果吻合较好 .
A finite-volume method of solving incompressible RANS equations was developed for the numerical simulation of three-dimensional viscous flow with free-surface about a ship. A hybrid turbulence model by combining the sub-grid scale (SGS) model and the Baldwin-Lomax model is used. The arbitrary-Lagrange-Euler formulation is devised for the treatment of free surface boundary condition. The boundary-fitted coordinate system is fitted not only to the ship hull surface but also to the free surface, so the computational grid is regenerated to follow the free surface deformation. This method has much longer computational time, but it can fairly display the wave pattern made by a ship. The numerical simulation was carried out for the viscous flow with free surface past Series 60 ship hull at Fn=0.316, Re=1.9×106. The computed results are in reasonable agreement with the experimental measurements.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第10期1429-1432,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目 ( 5 0 0 790 11)
关键词
自由面
三维船体
流性流场
计算
雷诺平均方程
数值模拟
Computational fluid dynamics
Computer simulation
Navier Stokes equations
Viscous flow
