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

Bladeless wind turbine captures wind energy based on wind-induced vortex Vibration, and has advantage of high space utilization rate. Here, to improve energy harvesting efficiency of bladeless wind turbine, based on studying energy harvesting efficiency of a single energy harvesting column (EHC), effects of dual-EHC arrangement with stagger angles ranging of 0 ~ 90° and spacing ratios of 1. 5 ~ 7. 0 under working wind speeds on wind turbine' s energy harvesting efficiency, vortex induced Vibration response and wake vortex structure were explored. The results showed that when staggered angle is 0° and 15°, energy capture efficiency of downstream EHC is lower than that of a single EHC, while energy capture efficiency of upstream EHC gradually increases with increase in spacing ratio, when spacing ratio is 3. 5, it is approximately equal to that of a single EHC; by comparing average efficiencies of dual-EHC and single EHC, arrangement ränge is divided into 3 regions of enhancing zone, suppressing zone and weak affecting zone; specifically, when spacing ratio is 2 and staggered angle is 90°, the average energy harvesting efficiency of dual-EHC reaches more than twice that of a single EHC. © 2025 Chinese Vibration Engineering Society. All rights reserved.