Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach
A novel vortex induced piezoelectric energy converter (VIPEC) was present in this paper to harvest flow kinetic energy from the ambient environment through a piezoelectric beam. The converter consists of a circular cylinder, a pivoted beam attached to the tail of the cylinder and several piezoelectr...
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doaj-838da8d5b317402c9b1186539eed4ddb2021-03-10T00:02:53ZengMDPI AGSustainability2071-10502021-03-01132971297110.3390/su13052971Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD ApproachXinyu An0Haocai Huang1Baowei Song2Congcong Ma3Ocean College, Zhejiang University, Zhoushan 316021, ChinaOcean College, Zhejiang University, Zhoushan 316021, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaLaboratoire Roberval, Université de Technologie de Compiègne, 60203 Compiègne, FranceA novel vortex induced piezoelectric energy converter (VIPEC) was present in this paper to harvest flow kinetic energy from the ambient environment through a piezoelectric beam. The converter consists of a circular cylinder, a pivoted beam attached to the tail of the cylinder and several piezoelectric patches. Vortex induced pressure difference acts on the beam and drives the beam to squeeze piezo patches to convert fluid dynamic energy into electric energy. Transition Shear Stress Transport (SST) combined with Scale Adaptive Simulation (SAS) model was employed to predict the turbulent flow and flow separation around the cylinder with various beam lengths at high Reynolds number of 8 × 10<sup>4</sup> based on the computational fluid dynamics (CFD) approach. The accuracy of SST-SAS model was investigated through verification and validation studies. The output voltage equation was derived from the piezoelectric constitutive equation. It was revealed that the beam length influences the flow wake pattern, the separation angle and shedding frequency greatly through changing the adverse pressure gradient around the cylinder. The wake pattern becomes symmetrical about the beam when the beam length is longer than a critical value. The length of the beam has little influence on the separation angle. When the beam length is about 1.3 times the diameter of the cylinder, the shedding frequency and output voltage achieves its maximum, and the separation angle is minimal. Maximal output voltage reaches 20 mV.https://www.mdpi.com/2071-1050/13/5/2971transition SST-SAShigh Reynolds number flowseparation angleshedding frequency |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xinyu An Haocai Huang Baowei Song Congcong Ma |
spellingShingle |
Xinyu An Haocai Huang Baowei Song Congcong Ma Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach Sustainability transition SST-SAS high Reynolds number flow separation angle shedding frequency |
author_facet |
Xinyu An Haocai Huang Baowei Song Congcong Ma |
author_sort |
Xinyu An |
title |
Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach |
title_short |
Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach |
title_full |
Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach |
title_fullStr |
Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach |
title_full_unstemmed |
Performance Evaluation of a Vortex Induced Piezoelectric Energy Converter (VIPEC) with CFD Approach |
title_sort |
performance evaluation of a vortex induced piezoelectric energy converter (vipec) with cfd approach |
publisher |
MDPI AG |
series |
Sustainability |
issn |
2071-1050 |
publishDate |
2021-03-01 |
description |
A novel vortex induced piezoelectric energy converter (VIPEC) was present in this paper to harvest flow kinetic energy from the ambient environment through a piezoelectric beam. The converter consists of a circular cylinder, a pivoted beam attached to the tail of the cylinder and several piezoelectric patches. Vortex induced pressure difference acts on the beam and drives the beam to squeeze piezo patches to convert fluid dynamic energy into electric energy. Transition Shear Stress Transport (SST) combined with Scale Adaptive Simulation (SAS) model was employed to predict the turbulent flow and flow separation around the cylinder with various beam lengths at high Reynolds number of 8 × 10<sup>4</sup> based on the computational fluid dynamics (CFD) approach. The accuracy of SST-SAS model was investigated through verification and validation studies. The output voltage equation was derived from the piezoelectric constitutive equation. It was revealed that the beam length influences the flow wake pattern, the separation angle and shedding frequency greatly through changing the adverse pressure gradient around the cylinder. The wake pattern becomes symmetrical about the beam when the beam length is longer than a critical value. The length of the beam has little influence on the separation angle. When the beam length is about 1.3 times the diameter of the cylinder, the shedding frequency and output voltage achieves its maximum, and the separation angle is minimal. Maximal output voltage reaches 20 mV. |
topic |
transition SST-SAS high Reynolds number flow separation angle shedding frequency |
url |
https://www.mdpi.com/2071-1050/13/5/2971 |
work_keys_str_mv |
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