Research on Magnus rudder lift/drag characteristics and rotational speed control for ships

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Journal of Dalian Maritime University ›› 2025, Vol. 51 ›› Issue (4) : 31-42.

JIANG Yinling^*1,2，XU Xile¹，CHEN Wenlong¹，SHEN Zhiguo³

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Abstract

This paper proposes a novel rudder device based on the Magnus effect. By using the Computational Fluid Dynamics (CFD) simulation method, the lift/drag characteristics of the Magnus rudder were analyzed. Firstly, the geometric model of the Magnus rudder was created through SolidWorks software. Secondly, steady-state fluid analysis of the Magnus rudder was conducted using ANSYS-Fluent, focusing on the changes in lift/drag under different rotational speeds and the influence of the rotational speed ratio on performance. Thirdly, a comparative study on the lift/drag characteristics between the traditional ship rudder and the Magnus rudder was carried out. The simulation results show that the Magnus rudder generates significantly greater lift during operation compared to the traditional rudder, and its drag is relatively smaller, demonstrating superior lift-to-drag ratio characteristics. Finally, a PID rotational speed control system for the Magnus rudder driven by a hydraulic motor was established on the Matlab-Simulink platform, providing an effective control solution for the practical application of the Magnus rudder.

Key words

CFD / Magnus rudder / lift/drag characteristics / Matlab-Simulink

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JIANG Yinling, XU Xile, CHEN Wenlong, SHEN Zhiguo. Research on Magnus rudder lift/drag characteristics and rotational speed control for ships[J]. Journal of Dalian Maritime University. 2025, 51(4): 31-42

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