Dynamics and performance evaluation of wind-induced vibration of a cuboid bluff body with two ornaments
Dynamics and performance evaluation of wind-induced vibration of a cuboid bluff body with two ornaments
The geometric design of the bluff body has a decisive effect on the wind-induced vibration energy harvesting performance. Aiming to enhance the properties of the wind-induced vibration energy harvester at the low-speed wind, we presented a wind-induced vibration energy harvester with two symmetrical additional ornaments, and the effects of installation location and size of ornaments on a cuboid bluff body are comprehensively studied. A distributed parameter model is developed based on the Euler-Lagrange equation. Corresponding numerical simulation and wind tunnel tests are implemented to evaluate the dynamics and performance of wind-induced vibration. The results show that the wind-induced vibration energy harvesters with various bluff bodies may exhibit galloping or vortex-induced vibrations (VIV) based on the position of ornaments and h/DB (h is the height of the ornament and DB is the diameter of the cuboid bluff body. For both Square-Front-h/DB (S–F-h/DB) and Square-Middle-h/DB (S-M-h/DB), the aeroelastic energy harvesting performance and the root-mean-square output voltage (Vrms) are improved in the low-speed wind. Compared with the cuboid bluff body, the critical wind speed (the smallest wind speed for triggering vibration) of S-M-0.25 is reduced by 18.18%, and the maximum voltage output reaches 10.89 V, which is increased by 105.72%. Afterwards, the three-dimensional computational fluid dynamics (3D-CFD) studies are conducted by Xflow to investigate the inherent physical mechanism of performance improvement. The results of vorticity vectors and vorticity contours verify the experimental results and reveal the insight mechanism of aerodynamic change. This work could provide a theoretical basis for optimizing wind-induced vibration energy harvesters and improving the performance of aeroelastic energy harvesting.
Galloping, Ornaments, Piezoelectric energy harvesting, Vortex induced vibration
Ren, He
89052dbc-457f-4c77-b9c0-01ff5b374e92
Zheng, Tian-yu
89626bbb-9644-4af0-b393-602723f145d5
Lin, Wen-yuan
09098f38-7e8c-4cbf-bc05-b448b72ece99
Li, Hai-Tao
1247dad5-18d2-4b78-884c-623bd591008e
Qin, Wei-Yang
d14fa435-8f16-4ad4-aaf8-c829c80c80e1
Yurchenko, Daniil
51a2896b-281e-4977-bb72-5f96e891fbf8
7 August 2023
Ren, He
89052dbc-457f-4c77-b9c0-01ff5b374e92
Zheng, Tian-yu
89626bbb-9644-4af0-b393-602723f145d5
Lin, Wen-yuan
09098f38-7e8c-4cbf-bc05-b448b72ece99
Li, Hai-Tao
1247dad5-18d2-4b78-884c-623bd591008e
Qin, Wei-Yang
d14fa435-8f16-4ad4-aaf8-c829c80c80e1
Yurchenko, Daniil
51a2896b-281e-4977-bb72-5f96e891fbf8
Ren, He, Zheng, Tian-yu, Lin, Wen-yuan, Li, Hai-Tao, Qin, Wei-Yang and Yurchenko, Daniil
(2023)
Dynamics and performance evaluation of wind-induced vibration of a cuboid bluff body with two ornaments.
Ocean Engineering, 286, [115517].
(doi:10.1016/j.oceaneng.2023.115517).
Abstract
The geometric design of the bluff body has a decisive effect on the wind-induced vibration energy harvesting performance. Aiming to enhance the properties of the wind-induced vibration energy harvester at the low-speed wind, we presented a wind-induced vibration energy harvester with two symmetrical additional ornaments, and the effects of installation location and size of ornaments on a cuboid bluff body are comprehensively studied. A distributed parameter model is developed based on the Euler-Lagrange equation. Corresponding numerical simulation and wind tunnel tests are implemented to evaluate the dynamics and performance of wind-induced vibration. The results show that the wind-induced vibration energy harvesters with various bluff bodies may exhibit galloping or vortex-induced vibrations (VIV) based on the position of ornaments and h/DB (h is the height of the ornament and DB is the diameter of the cuboid bluff body. For both Square-Front-h/DB (S–F-h/DB) and Square-Middle-h/DB (S-M-h/DB), the aeroelastic energy harvesting performance and the root-mean-square output voltage (Vrms) are improved in the low-speed wind. Compared with the cuboid bluff body, the critical wind speed (the smallest wind speed for triggering vibration) of S-M-0.25 is reduced by 18.18%, and the maximum voltage output reaches 10.89 V, which is increased by 105.72%. Afterwards, the three-dimensional computational fluid dynamics (3D-CFD) studies are conducted by Xflow to investigate the inherent physical mechanism of performance improvement. The results of vorticity vectors and vorticity contours verify the experimental results and reveal the insight mechanism of aerodynamic change. This work could provide a theoretical basis for optimizing wind-induced vibration energy harvesters and improving the performance of aeroelastic energy harvesting.
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More information
Accepted/In Press date: 29 July 2023
e-pub ahead of print date: 7 August 2023
Published date: 7 August 2023
Additional Information:
Funding Information:
This work is financially supported by the National Natural Science Foundation of China (Nos. 12272355 and 11902294 ), the Shanxi Scholarship Council of China (No. 2020–103 ) and the Opening Foundation of Shanxi Provincial Key Laboratory for Advanced Manufacturing Technology (No. XJZZ202304 ).
Keywords:
Galloping, Ornaments, Piezoelectric energy harvesting, Vortex induced vibration
Identifiers
Local EPrints ID: 484900
URI: http://eprints.soton.ac.uk/id/eprint/484900
ISSN: 0029-8018
PURE UUID: 8ed83abc-6713-4f65-8655-91c590d3d497
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Date deposited: 24 Nov 2023 17:32
Last modified: 18 Mar 2024 04:04
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Author:
He Ren
Author:
Tian-yu Zheng
Author:
Wen-yuan Lin
Author:
Hai-Tao Li
Author:
Wei-Yang Qin
Author:
Daniil Yurchenko
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