Flow induced vibrations (FIVs) of four tandem circular cylinders with roughness strips are numerically studied in Reynolds number range of 30,000â‰¤Reâ‰¤100,000. The power conversion and FIV responses are discussed. The VIV initial branch, VIV upper branch, VIV to galloping transition, and galloping are clearly observed for first cylinder. The amplitude ratio curves of third and fourth cylinders show an upward trend and the branches of FIV are not obvious. Both the converted power and conversion efficiency of four cylinders are higher than those of one, two and three cylinders when 62,049â‰¤Reâ‰¤90,000. The maximum total converted power reaches to 103W when Re=100,000.
Keywords flow-induced vibration, galloping, power conversion, four circular cylinders