基于CFD的散货船纵倾优化研究

Research on the optimization of the ditch of bulk carrier based on CFD

船舶阻力会随着航态的改变而改变。在航速和排水量不变的情况下,通过调节船舶纵倾进而减小航行阻力是1种可靠且通用性强的方法。文章以1万t的散货船为例,基于CFD数值计算仿真工具Fluent的k-ω湍流模型求解RANS方程组,验证Fluent仿真在船舶阻力计算方面的可靠性,并通过调节艏倾和艉倾,计算出相同航速不同纵倾角下的船舶阻力值,提出平浮并非是该船舶最佳航行状态的结论,对船舶实际运营提供指导。在此基础上,提出1种对Fluent进行二次开发以进行更高效船舶阻力预报的方法。

Ship resistance will change as the navigational state changes.It is a reliable and versatile method to reduce the navigational resistance by adjusting the ship's pitch while the speed and displacement are constant.Taking the 10,000-ton bulk carrier as an example,this paper solves the RANS equations based on the CFD numerical simulation tool Fluent's k-turbulence model,verifies the reliability of Fluent simulation in ship resistance calculation,and adjusts the tilt and tilt.Calculate the resistance value of the ship at different pitch angles at the same speed,and propose that the flat float is not the conclusion of the optimal navigation state of the ship,and provide guidance for the actual operation of the ship.On this basis,a method for secondary development of Fluent for more efficient ship resistance prediction is proposed.