Incident flow effects on the performance of piezoelectric energy harvesters from galloping vibrations

作     者：Abdessattar Abdelkefi Armanj Hasanyan Jacob Montgomery Duncan Hall Muhammad R.Hajj 

作者机构：Department of Engineering Science and Mechanics Virginia Tech 

出 版 物：《Theoretical & Applied Mechanics Letters》 (力学快报（英文版）)

年 卷 期：2014年第4卷第2期

页      面：91-96页

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：National Science Foundation  NSF  (1035042) 

主　　题：energy harvesting galloping oscillations incident flow effects experimentalmeasurements 

摘      要：In this paper, we investigate experimentally the concept of energy har- vesting from galloping oscillations with a focus on wake and turbulence effects. The .harvester is composed of a unimorph piezoelectric cantilever beam with a square cross-section tip mass. In one case, the harvester is placed in the wake of another galloping harvester with the objective of determining the wake effects on the response of the harvester. In the second case, meshes were placed upstream of the harvester with the objective of investigating the effects of upstream turbulence on the response of the harvester. The results show that both wake effects and up- stream turbulence significantly affect the response of the harvester. Depending on the spacing between the two squares and the opening size of the mesh, wake and upstream turbulence can positively enhance the level of the harvested power.