Flow‐Induced Vibration of V‐Shape Prism and its Application in Wind Energy Conversion

Inspired by the palm leaf structure, this work developed a novel V‐shape prism. The flow‐induced vibration (FIV) mechanism of the V‐shape prism under typical windward angles (α = 0°, 90°, and 180°) is studied by numerical simulation. The impact of wind speed and direction on vibration amplitude, frequency, force coefficient, phase, and vorticity contours is analyzed. The V‐shape prism undergoes vortex‐induced vibration (VIV) or galloping with the change of wind speed and direction. The vibration amplitude in galloping mode is higher than that in VIV mode. The wind speed and direction have little effect on the vibration frequency in galloping mode, while the vibration frequency in VIV mode is determined by the vortex shedding. The transform of the prism vibration mode is accompanied by a change of phase lag and vortex structure. The V‐shape prism at α = 0° exhibits a significantly greater vibration amplitude and energy conversion efficiency compared to both the square prism and other windward angles. The highest energy conversion efficiency of the V‐shape prism is 69.2%, which is 22.2 times that of the square prism device. This work presents the potential application of a V‐shape prism in the future design of FIV energy harvesters.