Abstract: The body-force method and the sliding mesh method are applied to numerical simulation of full-scale self-propulsion for a 9 400 TEU container vessel, respectively. The effects of the turbulence model, the meshing, the maximum number of the nonlinear iteration, the time step size, the geometrical parameter of the actuator disk and the size of the rotational domain on the calculation results are investigated successively. The key points affecting the calculation results and the corresponding optimal settings are determined by comparing with the model test results and the sea trial results, and the effectiveness of the self-propulsion numerical simulation at full-scale are validated. The propulsion factors and the flow field at the self-propulsion point of the two methods are analyzed and compared. It is found that both methods can predict the performance of the full-scale ship, but with different wake fields. The flow before the propeller disk of the two methods mainly differs in the axial and tangential flow, whereas the flow after the propeller disk mainly differs in the radial flow.

Key words: container vessel, full scale, self-propulsion, body force, sliding mesh, numerical simulation

摘要： 以9 400 TEU集装箱船为研究对象,分别采用体积力和滑移网格2种螺旋桨模拟方式进行实尺度自航性能数值模拟。先后考察湍流模型、网格划分、最大非线性迭代次数、时间步长、激励盘参数及动区域大小等因素对计算结果的影响,通过与模型试验换算及实船试航结果对比,确定了影响计算结果的关键因素及相应最佳设置,并且验证了实尺度自航性能数值模拟的有效性。分析对比了2种方法在实船自航点的自航推进因子及流场,发现两者均能较好预估实船性能。但是尾流场存在差异,对于桨前流动,两者主要差异在于轴向和切向流动;而对于桨后流动,两者主要差异在于径向流动。

关键词: 集装箱船, 实尺度, 自航性能, 体积力, 滑移网格, 数值模拟