Three-dimensional effects on slamming loads predictions are investigated numerically using the unsteady incompressible Reynolds-Average Navier-Stokes (RANS) equations and volume of fluid (VOF) method, which are implemented in the open-source library OpenFoam. Three cases of free-falling water entry problems are considered. The numerical solutions are validated through the comparisons of slamming loads and motions between the CFD simulations and the available experimental values. The total slamming force and slamming pressures on the 3D wedge cylinder, ship section and slender circular cylinder are compared with the results on the 2D sections, respectively. The results show that the 3D predictions on the maximum slamming force coefficient are around 21%∼23% lower for the wedge with a deadrise angle of 30º and are around 16% lower for the slender circular cylinder, relative to the 2D calculations.

使用在开放源代码库OpenFoam中实现的非稳态不可压缩雷诺平均Navier-Stokes（RANS）方程和流体体积（VOF）方法，数值研究了对砰击载荷预测的三维影响。考虑了三种自由落体水进入问题的情况。通过比较CFD模拟和可用实验值之间的冲击载荷和运动来验证数值解。将3D楔形圆柱体，船截面和细长圆柱体上的总撞击力和撞击压力分别与2D截面上的结果进行比较。