利用圆柱附属分离盘流激振动收集能量的数值模拟  

Numerical simulation of energy harvesting of cylinder attached with splitter plate based on its flow-induced vibration

作　　者：林凌霄 王嘉松[1] 申玉 Ling-xiao Lin;Jia-song Wang;Yu Shen(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《水动力学研究与进展（A辑）》2022年第3期309-316,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(11872250)。

摘　　要：基于压电原理转化机械振动能量是一种有效的绿色能量收集技术,可用于从结构的流激振动中获取能量。它涉及流-固-电的耦合,现有研究主要集中于流-固耦合,且涉及与电耦合的研究鲜有报道。该文基于Open FOAM自主开发流动-振动-电路耦合的能量收集求解器,对利用圆柱附加分离盘产生流激振动,获取能量的过程进行了数值模拟。结果表明:负载电阻的增大使机电耦合阻尼先上升后下降,机电耦合阻尼的升高使振幅减小。在高机电耦合阻尼情况下,结构振动由驰振转变为涡激振动。涡激振动工况在锁定区内有较大的输出电压、输出功率和效率,但是离开锁定区后,能量收集效果迅速减弱。驰振工况的输出电压、输出功率和效率随流速增大呈上升趋势。It is an effective technology to convert vibration energy into electrical energy based on piezoelectric effect,which harvests energy from the flow-induced vibration of the structure.It involves the coupling of fluid,structure and electricity.However,the existing researches mainly focus on the fluid-structure coupling,while the coupling of fluid-structure-electricity is rarely studied.Based on the numerical platform of OpenFOAM,a fluid-structure-electricity-interaction solver is developed.A coupling simulation is executed on the flow-induced vibration of a cylinder attached with splitter plate which generates energy.The electromechanical coupling damping increases first and then decreases as load resistance rises.The vibration amplitude decreases as electromechanical coupling damping increase.The vibration of the structure changes from galloping to vortexinduced vibration under high electromechanical coupling damping.Vortex-induced vibration cases have relatively large output voltage,output power and efficiency in lock-in regime,of which energy collecting e fficiency decrease sharply beyond lock-in regime.With the increase of flow velocity,output voltage,output power and efficiency of galloping cases increase.

关 键 词：能量收集 分离盘 驰振 涡激振动 机电耦合阻尼 

分 类 号：TH113.1[机械工程—机械设计及理论]