摘要
为满足管道监测系统的自供电需求,提出一种复合钝体扰流纵振式压电气流发电机。介绍了发电机的结构、工作原理。通过理论分析与实验测试研究了钝体结构对其性能的影响,证明了发电机原理的可行性。研究结果表明:平均阻力随流速及直径比增加呈二次方增长,平均阻力系数随直径比的增大而增大,最后趋于稳定(5.34);对于柔性钝体发电机,直径比与钝体厚度对其输出电压均有较大影响,存在最佳直径比(α=0.953)与最佳厚度(0.1 mm<C<0.3 mm)使发电机的输出电压达到最大;当流速较高且其他条件相同时,A型、B型钝体发电机的输出电压要高于C型钝体发电机;对于B型钝体发电机,刚柔直径比对其输出电压影响显著,存在最佳刚柔直径比(γ=0.429,γ=0.929)使得发电机的峰值电压达到最大。
To meet self-powered requirements of the pipeline monitoring system,a composite turbulent bluff-body piezoelectric airflow generator using axial longitudinal vibration mode was proposed in this paper.The structure and working principle of the airflow generator were introduced.The theoretical analysis and experimental tests were carried out to study the influence of the bluff body structure on its performance.Therefore,the principle feasibility of the composite bluff-body piezoelectric airflow generator using axial longitudinal vibration mode was proved.The results show that the average drag increases quadratically with the increasing of flow velocity and bluff-body diameter ratio.The average drag factor increases with the increasing diameter ratio until it reaches a steady-state value of 5.34 finally.For the piezoelectric airflow generator with the flexible bluff body,both diameter ratio and the thickness of bluff body have great influence on the output voltage.There are optimal diameter ratio(α=0.953)and optimal thickness range(0.1 mm<C<0.3 mm)of bluff body to maximize the output voltage.At the high flow velocity,the output voltage of generators with Type-A and Type-B bluff body is higher than that of generator with Type-C bluff body.For the generator with Type-B bluff body,the diameter ratio of rigid body to flexible body has significant influence on the output voltage.There is an optimal rigid-flexible diameter ratio(γ=0.429,γ=0.929)to maximize the output voltage.
作者
梁程
阚君武
张忠华
王淑云
黄鑫
富佳伟
LIANG Cheng;KAN Junwu;ZHANG Zhonghua;WANG Shuyun;HUANG Xin;FU Jiawei(Institute of Precision Machinery and Smart Structure,Zhejiang Normal University,Jinhua 321004,China;Key Laboratory of Urban Rail Transit Intelligent Operationand Maintenance Technology and Equipment of Zhejiang Province,Jinhua 321004,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2021年第2期9-14,80,共7页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51877199,61574128,52077201,51377147)
浙江省自然科学基金项目(LY20F010006)
国家级大学生创新创业训练计划资助项目(201810345036,201810345037,201910345047)。
关键词
压电
自供电
发电机
流体
自激
piezoelectric
self-powered
generator
fluid
self-excitation
