Advanced Aerodynamic Energy Harvester Based on the Dual‐Cylinder Vortex‐Induced Vibration Coupling Effect

Flow‐induced vibration (FIV)‐based wind energy harvesters (WEHs) exhibit unique structural advantages and exceptional adaptability in harvesting disordered wind energy. However, WEHs that rely solely on FIV still suffer from insufficient vibration response and constrained output performance. Here, this work proposes a dual‐cylinder vortex‐induced vibration composite nanogenerator (DVNG). DVNG is designed based on advanced aerodynamic principles, significantly enhancing aerodynamic performance through dual‐cylinder vortex‐induced vibration coupling and integrating triboelectric and electromagnetic technology for efficient harvesting of disordered wind energy. By optimizing the structure and parametric arrangement of the dual‐cylinder configuration, the short‐circuit currents of the TENG and EMG units in the DVNG are increased 7‐fold and 12‐fold, respectively. Subsequently, further optimization of the power generation unit parameters enables the DVNG to achieve a peak power density of 11.8 W m −3 at a wind speed of 8 m s −1 . Finally, the DVNG successfully powers multiple sensors and warning lights, establishing a self‐powered health monitoring system for smart rail transit. Overall, this work offers a novel approach for the efficient harvesting of disordered wind energy using FIV‑based nanogenerators and further demonstrates its application prospects in smart transportation.