Low-speed wind energy harvesting from a vibrating cylinder and an obstacle cylinder by flow-induced vibration effect.

Autor: Farsi, M., Shariatzadeh, M. J., Bijarchi, M. A., Pournasiri Masouleh, E., Shafii, M. B.
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Zdroj: International Journal of Environmental Science & Technology (IJEST); Mar2022, Vol. 19 Issue 3, p1261-1272, 12p
Abstrakt: An experimental setup has been developed to analyse the impact of cylinder transverse vibration caused by flow-induced vibration, and to improve wind energy harvesting from these vibrations. The setup consists of a cylinder mounted on four springs and is subjected to a uniform and steady flow of wind. In the first part, the effect of mounting a fixed cylinder as an obstacle with different diameters and distances from the downstream vibrating cylinder is investigated. It has been observed that the vibration amplitude on the wake of an unequal-sized obstacle is greatly amplified compared to the case of a single cylinder or an equal-sized cylinder. Numerical simulations has been conducted to predict the behaviour of cylinder in different situations and the final result obtained from numerical simulations and experimental method were in a good agreement. In the second part of this study, all experiments have been repeated with same parameters as the first part, while coils and magnets are added to the system. Oscillation of attached magnets inside the coils generates electricity as the cylinder undergoes wake-induced vibration. The efficiency of the system is calculated based on the generated power and extractable kinetic power of the wind. Results show that mounting a stationary cylinder as an obstacle increases generated power efficiency to almost three times greater than a single vibrating cylinder. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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