摘要
为了提高压电能量采集器的使用寿命,保证内部发电部件的稳定运行,提出了一种柔性套管悬臂梁式压电能量采集器收集能量的盾形截面的钝体,通过实验研究该结构的输出性能。分析了外接负载、风速、钝体质量对能量采集器的输出功率的影响。结果表明:能量采集器的输出功率随着负载阻值的增大呈现先增大后减小的趋势,存在最佳负载使得能量采集器的输出功率达到最大;同时输出功率会随流速的增大而增大,符合驰振现象;在实验所考虑的质量范围内,最大输出功率随着质量的增大而减小。实验中,能量采集器在钝体质量为70 g,最佳负载为10^(5)Ω,流速为8.0 m/s时达到最大输出功率5.22 mW。
In order to improve the service life of the piezoelectric energy collector and ensure the stable operation of the internal power generation components,a blunt body with shield cross-section of the flexible sleeve cantilever beam piezoelectric energy collector is proposed.The influence of external load,wind speed and blunt body mass on the output power of the energy collector is analyzed.The results show that the output power of the energy collector increases first and then decreases with the increase of load resistance,and the optimal load makes the output power of the energy collector reach the maximum.At the same time,the output power will increase with the increase of the flow rate,which accords with the phenomenon of galloping.In the range of mass considered in the experiment,the maximum output power decreases with the increase of mass.In the experiment,the maximum output power of the energy collector is 5.22 mW when the blunt body mass is 70 g,the optimal load is 10^(5)Ω,and the flow rate is 8.0 m/s.
作者
诸磊
韩东
徐贵力
周茂林
俞思涌
何纬峰
ZHU Lei;HAN Dong;XU Gui-li;ZHOU Mao-lin;YU Si-yong;HE Wei-feng(School of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《节能技术》
CAS
2024年第3期195-199,共5页
Energy Conservation Technology
基金
江苏省自然科学基金项目(BK2020129)
江苏省重点研究开发项目(BE2019088)。
关键词
流致振动
压电能量采集器
驰振
柔性套管
发电功率
fluid-induced vibration
piezoelectric energy harvester
galloping,flexible bushing
generating power
