The transient numerical simulation has been conducted by using of the Overlapping grid technique to investigate the ground wall effect on the propulsive performance of an oscillating wing. Both the two-dimensional and three-dimensional wing have been analyzed and the systematic analysis on the effect of the Reynolds number (Re), the average distance between the flapping foil and ground wall (h₀) on the propulsive performance of oscillating wing are investigated with respect to the non-dimensional oscillating frequency (St). The simulation results demonstrate that the existence of the ground wall can produce significant influence on the fluid dynamics of oscillating wing and the ground wall effect has close connection to the magnitude of St number. In addition, the increase of Re number will facilitate the growth of both thrust force and propulsive efficiency of oscillating wing and that influence also has close connection with the St number. Finally, the existence of ground wall can also greatly improve the propulsive performance of three-dimensional oscillating wing, but the sensitivity of three-dimensional oscillating wing to the ground wall is lower than that of two-dimensional oscillating wing. The conclusions acquired here can be utilized to optimize the kinematics of the underwater vehicles swimming near ground wall.

利用重叠网格技术进行了瞬态数值模拟，以研究地壁对摆动翼推进性能的影响。无论是二维和三维翼进行了分析和雷诺数（效果的系统的分析- [R e）中，扑箔和接地壁之间的平均距离（ħ ₀）上摆动翼的推进性能就无量纲振荡频率 ( S t) 进行研究。仿真结果表明，地壁的存在对摆动翼的流体动力学产生显着影响，地壁效应与摆动翼的大小密切相关。S t 数。此外，R e 数的增加将有利于摆动翼推力和推进效率的增长，这种影响也与S t 数密切相关。最后，地壁的存在也可以大大提高三维摆翼的推进性能，但三维摆翼对地壁的敏感性低于二维摆翼。此处获得的结论可用于优化水下航行器在地壁附近游泳的运动学。