摘要
无叶片风力机基于风致涡激振动捕获风能,具有空间利用率高的优点。为提升无叶片风力机群的捕能效率,在单个捕能柱(energy harvesting column,EHC)捕能效率研究的基础上,探讨工作风速下错列角度为0°~90°、间距比为1.5~7.0内、双EHC布置形式对其捕能效率、涡激振动响应以及尾涡结构的影响。所得结果表明:当错列角度为0°和15°时,下游EHC的捕能效率小于单个EHC,而上游EHC的捕能效率随间距比增大而逐渐提升,当间距比为3.5时,约等于单个EHC;通过对比双EHC和单个EHC的平均效率,布置范围被分为三个区域,即增强区、抑制区和弱影响区;特别地,当间距比为2.0,错列角度为90°时,双EHC的平均捕能效率达到单个EHC的2倍以上。
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 range 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.
作者
刘奇良
龚曙光
谢桂兰
唐芳
梁志玮
LIU Qiliang;GONG Shuguang;XIE Guilan;TANG Fang;LIANG Zhiwei(College of Mechanical Engineering and Mechanics,Xiangtan University,Xiangtan 411105,China)
出处
《振动与冲击》
北大核心
2025年第7期37-44,75,共9页
Journal of Vibration and Shock
基金
国家自然科学基金(51875493)
湖南省重大标志性创新示范工程项目(2022XK2301)
湖南省自然科学基金(2021JJ40537)
湖南省研究生科研创新项目资助(CX20220602)。
关键词
无叶片风力机
涡激振动
捕能柱(EHC)
布置形式
捕能效率
bladeless wind turbine
vortex-induced vibration
energy harvesting column(EHC)
arrangement
energy harvesting efficiency
