Effects of dual-energy harvesting column arrangement on energy harvesting efficiency of bladeless wind turbine

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (7) : 37-44.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Effects of dual-energy harvesting column arrangement on energy harvesting efficiency of bladeless wind turbine

IU Qiliang, GONG Shuguang*, XIE Guilan, TANG Fang, LIANG Zhiwei

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Abstract

Bladeless wind turbines harvest wind energy through wind-induced vortex vibration, boasting a high spatial utilization advantage. To enhance the energy harvesting efficiency of arrays for bladeless wind turbines, builds upon the research of energy harvesting efficiency in a single energy harvesting cylinder (EHC), the effects of arrangements for twin EHCs—considering stagger angles ranging from 0° to 90° and spacing ratios from 1.5 to 7—on the energy harvesting efficiency, vortex-induced vibration, and vortical structure at operational wind speeds are studied. The findings indicated that at stagger angles of 0° and 15°, the downstream EHC exhibits a lower energy-harvesting efficiency compared to a single EHC. In contrast, the upstream EHC’s efficiency increases with the spacing ratio, reaching equivalence with a single EHC at a spacing ratio of 3.5. By comparing the average efficiency of twin EHCs with that of a single one, the arrangements considered in this paper are classified into three regions: enhancement, suppression, and weak influence. Notably, the average efficiency of the twin EHCs increases more than twofold at a spacing ratio of 2 and a stagger angle of 90°.

Key words

bladeless wind turbine / vortex-induced vibration / energy harvesting cylinder / arrangement / energy harvesting efficiency

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IU Qiliang, GONG Shuguang, XIE Guilan, TANG Fang, LIANG Zhiwei. Effects of dual-energy harvesting column arrangement on energy harvesting efficiency of bladeless wind turbine[J]. Journal of Vibration and Shock, 2025, 44(7): 37-44

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