【摘要】 [目的]为研究小型电池动力船舶重心纵向位置对船舶阻力的影响，[方法]以一艘4.98 m电池动力钓鱼艇为研究对象，使用计算流体动力学（CFD）软件STAR-CCM+对船舶阻力进行数值模拟，采用雷诺时均（RANS）方程作为控制方程，并选用Realizable??ρ/??t+??(ρu_i)/??x_i=0湍流模型进行湍流封闭。同时，进行网格无关性分析与ITTC-1957摩擦阻力系数经验公式验证，并对不同重心纵向位置的仿真计算进行对比分析。[结果]结果表明，随着重心纵向位置前移，剪切阻力呈现出逐渐增大的趋势，压差阻力呈现出先减小后增大的趋势，总阻力呈现出先减小后增大的趋势。当重心纵向位置为2.05 m时，纵倾角为0.958°，总阻力达到最小值729.305 N，比最大值减小了28.87%。[结论]通过合理布置重心纵向位置，得到设计航速下最佳纵倾角，从而降低小型动力电池船舶航行阻力。更多还原

【Abstract】 [Purpose] To investigate the influence of the longitudinal center of gravity position on the resistance of small battery-powered ships, [Method] a 4.98 m battery-powered fishing boat is selected as the research object. The commercial computational fluid dynamics(CFD) software STAR-CCM+ is used to numerically simulate the ship’s resistance. The Reynolds Averaged Navier-Stokes(RANS) equations are employed as the governing equations, and the Realizable ??ρ/??t+??(ρu_i)/??x_i=0 turbulence model is adopted for turbulence closure. A mesh independence analysis is carried out, and the numerical results are validated using the empirical formula for frictional resistance coefficient provided by the International Towing Tank Conference in 1957(ITTC-1957). Comparative simulations are conducted for different longitudinal center of gravity positions. [Result] The results show that as the longitudinal center of gravity moves forward, the viscous(shear) resistance gradually increases, the pressure resistance first decreases and then increases, and the total resistance exhibits a similar trend of initial reduction followed by an increase. When the longitudinal center of gravity is located at 2.05 m, the trim angle reaches 0.958°, and the total resistance achieves a minimum value of 729.305 N, representing a 28.87% reduction compared to the maximum resistance. [Conclusion] By reasonably arranging the longitudinal center of gravity position, the optimal trim angle at the design speed can be achieved, thus effectively reducing the navigation resistance of small battery-powered vessels.更多还原