Padilha de Lima, João VictorJoão VictorPadilha de LimaFernandes, Antonio CarlosAntonio CarlosFernandesAbdel-Maksoud, MoustafaMoustafaAbdel-Maksoud2025-11-032025-11-032026-10-21Ocean Engineering 343: 123047 (2026)https://hdl.handle.net/11420/58426The article proposes an innovative concept of a current turbine based on the torsional galloping phenomenon, combined with the magnetic repulsion of a streamlined thin vertical plate, intended to harvest energy from low-head water currents. The driving proposal is to exploit the inherent instability of the arrangement. Hence, a careful non-linear instability analysis using the Poincaré method was performed numerically and experimentally. The mathematical model based on Bessel functions and potential theory was validated experimentally. The study carried out different configurations, comprising different stability conditions. The variances are selected by variance analysis. Since energy extraction is performed due to its unstable behavior, the occurrence of a stable condition must be avoided. It has been possible to select the condition where the turbine presents the most significant instability and the one that will provide higher efficiency. A final experimental set-up reached conclusive and successful feasibility.en0029-80182026ElsevierExperimental analysisInnovative current turbineMagnetic repulsionPoincaré methodRenewable energyStability analysisTorsional gallopingTechnology::620: EngineeringJournal Article10.1016/j.oceaneng.2025.123047Journal Article