Wind is one of the cleanest energy sources, and various wind energy harvesters have been proposed. Here, we study the vibration behavior and excitation mechanism of an ultra-stretchable electrode film, using which the fabricated TENG device if for wind energy harvesting. The motion of the ultra-stretchable film in the flow is illustrated as a coupling of vortex-induced elastic torsional deformation and pressure-driven galloping. Aerodynamic models based on structural mechanics and computational fluid dynamics (CFD) are established to systematically elaborate the deformation characteristics. On the basis of aerodynamic characteristics, perforations are developed on the electrode film as geometric optimization to enhance performance of the TENG, in which the output power has been improved for 56.3% in comparison to the original device. This work firstly demonstrates the flow-induced vibration of the ultra-stretchable film in TENG, which may paves a way for improving the design of miniature wind energy harvesters.

风是最清洁的能源之一，并且已经提出了各种风能收集器。在这里，我们研究了一种超可拉伸电极膜的振动行为和激发机理，利用该膜可制造出的TENG装置用于风能收集。流动中超可拉伸薄膜的运动以涡旋引起的弹性扭转变形与压力驱动的驰豫的耦合形式示出。建立了基于结构力学和计算流体动力学（CFD）的空气动力学模型，以系统地阐述变形特性。根据空气动力学特性，在电极膜上开孔作为几何优化，以增强TENG的性能，与原始设备相比，其输出功率提高了56.3％。