Understanding the complex flow fields behind the propeller and the structure of vortex shedding of cycloidal propellers are essential to analyzing the instantaneous forces on the blades and the overall hydrodynamic performance. In this paper, numerical simulation is performed to investigate the hydrodynamics and vortex shedding of cycloidal blades. The numerical results agree well with experimental results. The flow field around the propeller was investigated and a three-dimensional analysis was performed for flow fields behind the propeller. The complex flow fields and vortices around the blades were then examined. Finally, parametric analysis shows that eccentricity, advance coefficient, and position of rotation center have significant effects on vortex formation and shedding, clearly affecting the pulsation of the forces on the blade.

了解螺旋桨后面的复杂流场以及摆线螺旋桨的涡旋脱落结构对于分析叶片上的瞬时力和整体流体动力性能至关重要。在本文中，进行了数值模拟以研究摆线叶片的流体动力学和涡旋脱落。数值结果与实验结果吻合良好。对螺旋桨周围的流场进行了研究，并对螺旋桨后面的流场进行了三维分析。然后检查叶片周围的复杂流场和涡流。最后，参数分析表明，偏心距，超前系数和旋转中心位置对涡流的形成和脱落有显着影响，从而明显影响叶片上力的脉动。