RESEARCH ON VORTEX-INDUCED VIBRATION AIRFLOW ENERGY HARVESTING PROPERTIES BASED ON LES METHOD

被引：0
|
作者：
Hu J. [1 ,2 ]
Huang J. [1 ]
Li H. [1 ]
Wen J. [1 ]
Xiao Z. [1 ]
Li B. [1 ,2 ]
机构：
[1] College of Engineering, Jiangxi Agricultural University, Nanchang
[2] Jiangxi Engineering Research Center of Animal Husbandry Facility Technology Exploitation, Nanchang
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 05期
关键词：
aero-electromechanical coupling; model; piezoelectric; vortex-induced vibration; wind energy;
D O I：
10.19912/j.0254-0096.tynxb.2023-0058
中图分类号：
学科分类号：
摘要：
In this paper，the energy capture characteristics of the vortex-induced vibration piezoelectric energy harvesters（VIVPEHS）with two side- by- side circular cylinders are deeply studied，Based on the open- source platform of OpenFOAM & Matlab software，coupling calculation for vortex- induced vibration is taken on LES equation，second- order Van der pol equation and Gauss law. Meanwhile，the two side-by-side circular cylinders of VIVPEHS is prepared，and a energy collection platform is established for above model verification. The numerical results show that the lift and drag force，piezoelectric cantilever displacement，electromechanical conversion efficiency and wake morphology are in good agreement with the experimental data，and this results show the accuracy and rationality of VIVPEHS numerical calculation. Moreover，the results of experiment and calculation show that the output voltage（U）first increases and then decreases with the energy capture distance（ Sn ）increases when the cylinder diameter（ D）is certain，the U is the largest at Sn = 8D . In addition，the results of experiment and calculation show that the output power（ P ）first increases and then decreases with the increase of load impedance（ R）. It is noteworthy that the P reaches 72 mW when the optimal R is 25000 Ω，and 21 commercial LEDs are lit by our device when D = 0.1 m，v = 2.0 m/s，Sn = 8D . © 2024 Science Press. All rights reserved.
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页码：70 / 76
页数：6
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