光学精密工程2023，Vol.31Issue(24)：3570-3579,10.DOI:10.37188/OPE.20233124.3570
可变形式翼型钝体的风致振压电俘能器
Wind-induced vibration piezoelectric energy harvester with a deformable airfoil-shape blunt body
摘要
Abstract
A novel wind-induced-vibration piezoelectric-energy harvester with a deformable airfoil-shaped bluff body is proposed in this study to solve the problems of narrow wind speed bandwidths and excessive amplitudes at high wind speeds.The harvester mainly consists of a deformable bluff body,cantilever beam,and piezoelectric vibrator.The elastic wing of the bluff body deforms at different wind speeds,thus achieving the self-adjustment of the vibration characteristics and improving the environmental adaptability of the harvester.A COMSOL finite element model of the energy harvester is established,and the effect of wind speed on the shape and vibration characteristics of the bluff body is analyzed via simulations and ex-periments.In addition,the effects of windward angle θ and elastic wing thickness e on the output perfor-mance of the energy harvester are determined.The results show that the wind speed bandwidth of the har-vester ranges from 4 m/s to 25 m/s at a windward angle θ of 120° and an elastic wing thickness e of 0.15 mm.Furthermore,the deformation of the elastic wing becomes small when the wind speed is lower than 8 m/s.When the wind speed ranges from 8 m/s to 17 m/s,the harvester experiences a transformation from galloping to vortex-induced vibration,resulting in a decrease in the output voltage.When the wind speed ranges between 17 m/s and 25 m/s,the bluff body has an arc shape because of the excessive defor-mation of the elastic wing.The harvester is dominated by vortex-induced vibration,and thus,its ampli-tude can be effectively suppressed.The output voltage decreases with increasing wind speed.Additional-ly,the test results show that the harvester can yield a maximum output power of 3.78 mW at a matching impedance of 250 kΩ.Both the theoretical analysis and experimental results indicate that the proposed har-vester can satisfy the requirements of high reliability,low cut-in wind speed,and broad wind speed band-width,as well as generate considerable electric power.关键词
压电俘能器/风致振动/可变形钝体/驰振/涡激振动Key words
piezoelectric energy harvester/wind-induced vibration/deformable blunt body/galloping/vortex-induced vibration分类
电子信息工程引用本文复制引用
张忠华,李哲,孟凡许,王淑云,李赫,阚君武..可变形式翼型钝体的风致振压电俘能器[J].光学精密工程,2023,31(24):3570-3579,10.基金项目
国家自然科学基金资助项目(No.52077201,No.51877199) （No.52077201,No.51877199）
浙江省自然基金资助项目(No.LY20F010006) （No.LY20F010006）
浙江省重点研发计划资助项目(No.2021C01181) （No.2021C01181）
国家级大学生创新创业训练计划项目(No.202310345038) （No.202310345038）
