基于STAR-CCM+的30000 t散货船水阻力计算

Calculation and analysis of water resistance of 30 000 t bulk carrier based on STAR-CCM+

考虑到船舶数值模拟过程中的不同的计算策略对于船舶阻力精确度影响不同,对STAR CCM+软件仿真过程中影响较大的几种影响因素进行对比分析,探讨了30 000 t散货船在不同计算区域、网格密度以及湍流模型等条件下船舶阻力的变化情况。结果表明,相比减少网格基础尺寸,适当的增加计算区域,可以在保证计算精度的情况下,减少计算时长,推荐采用SST K-Omega湍流模型进行仿真计算。提出的计算策略仿真误差在5%以内,满足实际的工程设计需要,是一种较为可靠的船舶阻力数值模拟方法,可为今后散货船静水阻力数值计算提供参考。

Considering that different calculation strategies in the process of ship numerical simulation have different effects on the accuracy of ship resistance, this paper compares and analyzes several influential factors in the process of STAR-CCM+ software simulation, and discusses the changes in ship resistance of 30000 t bulk carrier in different calculation areas, grid density, turbulence models and other conditions. The analysis results show that, compared with reducing the grid size, increasing the calculation area appropriately can reduce the calculation time while ensuring the calculation accuracy. The SST K-Omega turbulence model is recommended for simulation calculation. The simulation error of the calculation method proposed in this paper is within 5%, which can meet the needs of practical engineering design. It is a reliable numerical simulation method of ship resistance and can provide a reference for the calm water resistance numerical calculation of bulk carriers.