浅窄航道会遇船舶水动力相互作用数值计算

该文应用CFD软件对两船在浅窄航道中会遇时的水动力相互作用进行数值研究,通过求解非定常RANS方程并结合RNG k-ε湍流模型,采用动网格技术及UDF进行船舶运动过程中的网格更新,对两船沿平行直线航行时的三维非定常黏性流场进行数值模拟,并对其相互作用水动力进行了计算。首先通过计算结果与试验数据进行对比,验证了数值方法的可行性和有效性;随后对四种船型在不同水深、航道宽度、两船航速比和船-船横向间距下的水动力进行了系列计算,通过结果分析得出了以上因素对两船会遇水动力相互作用的影响规律。

Numerical calculation of the hydrodynamic interaction between two ships meeting in restricted waterways

A general-purpose CFD software is applied to numerically study the hydrodynamic interaction between two ships meeting in restricted waterways.The unsteady RANS equation in conjunction with the RNG k-ε turbulence model is solved to simulate the 3D unsteady viscous flow,and to calculate the hydrodynamic interaction forces on the ships traveling along parallel courses.The relative motion of ships is dealt with by the dynamic mesh method and UDF.First,the feasibility and effectiveness of the proposed method are verified by comparing the numerical results with experimental data.Then systematic calculations are conducted for four kinds of ship types at different water depths,waterway widths,ratios of ship speeds and ship-ship lateral distances,and the numerical results are compared and analyzed to investigate the influences of these factors on the hydrodynamic interaction.