用于能量收集的基于涡致振动的双自由度嵌套式压电圆管俘能结构  

Energy Capture Structure of Two Degrees of Freedom Nested Piezoelectric Circular Tube Based on Vortex Induced Vibration for Energy Harvesting

作　　者：安然然 荣凯超 马雄飞 陈鹏 冯事成 李莉 An Ranran;Rong Kaichao;Ma Xiongfei;Chen Peng;Feng Shicheng;Li Li(College of Computer Science and Technology,Shenyang University of Chemical Technology,Shenyang 110142,China;Key laboratory of Intelligent Technology for Chemical Process Industry of Liaoning Province,Shenyang 110142,China)

机构地区：[1]沈阳化工大学计算机科学与技术学院,沈阳110142 [2]辽宁省化工过程工业智能化技术重点实验室,沈阳110142

出　　处：《微纳电子技术》2023年第12期2011-2019,共9页Micronanoelectronic Technology

基　　金：辽宁省自然科学基金(2019-ZD-0075);北京市传感器重点实验室开放课题(2020CGK005)。

摘　　要：为解决俘能结构频带较窄,仅能从一个方向对机械振动能量进行收集的问题,研发了一种基于涡致振动的双自由度嵌套式压电圆管俘能结构。建立了俘能结构的流-固-电耦合数学模型,利用数值模拟和实验测试对前置阻流体的单俘能结构、串列双俘能结构及并列双俘能结构等情况进行了研究,分析了这些结构的振动性能与压电特性。数值模拟与实验测试结果表明,风速、俘能结构间距、压电圆环直径以及俘能结构排列方式都会影响压电俘能结构性能。在数值分析中,并列双俘能结构输出电压最大,在当结构间距(L)与压电俘能结构外直径(D)之比为2、风速为7 m/s时,上下端俘能结构的最大输出电压分别为5.7和6.8 V,对应输出功率为165和193μW。实验测试中,在风速为7 m/s、L/D=2时输出电压出现最大值,其上端俘能结构的最大输出电压为3.7 V,输出功率为80μW;下端俘能结构的最大输出电压为5.2 V,输出功率为148μW。研究结果表明,双自由度嵌套式俘能结构及其阵列可适当提高结构的输出电压,可为研究涡致振动压电能量收集提供新的参考方案。To solve the problem that the frequency band of the energy capture structure is narrow and the mechanical vibration energy can only be collected from one direction,a two-degree-offreedom nested piezoelectric circular tube energy capture structure based on vortex vibration was developed.The fluid-solid-electric coupling mathematical model of the energy capture structure was established.Numerical simulation and experimental tests were used to study the single energy harvesting structure with pre-resistance fluid,tandem double energy capture structure and parallel double energy capture structure.The vibration and piezoelectric characteristics of the structures were analyzed.The results of numerical simulation and experimental tests show that the wind speed,spacing between the energy capture structures,diameter of the piezoelectric rings and arrangement of the energy capture structures all affect the performance of the piezoelectric energy capture structures.In the numerical analysis,the output voltage of the parallel double energy capture structure is the highest.When the ratio of structural spacing(L)to the outer diameter(D)of the piezoelectric energy capture structure is 2 and the wind speed is 7 m/s,the maximum output voltages of the upper and lower energy capture structures are 5.7 and 6.8 V respectively,the corresponding output powers are 165 and 193μW.In the experimental test,the maximum output voltage appears when the wind speed is 7 m/s and L/D=2,the maximum output voltage and output power of the upper energy capture structure are 3.7 V and 80μW,and the maximum output voltage of the lower energy capture structure is 5.2 V and the output power is 148μW.The results show that the two-degree-of-freedom nested energy capture structure and its array can appropriately improve the output voltage of the structure,which can provide a new reference scheme for the study of piezoelectric energy harvesting from vortex-induced vibration.

关 键 词：压电能量收集 双自由度俘能结构 涡致振动 压电圆管 ANSYS 

分 类 号：TM619[电气工程—电力系统及自动化] TN384[电子电信—物理电子学]