中文版 | English
Title

Passively adaptive wind energy harvester featuring a double-airfoil bluff body with adjustable attack angles

Author
Corresponding AuthorBao,Bin
Publication Years
2023-02-15
DOI
Source Title
ISSN
0888-3270
EISSN
1096-1216
Volume185
Abstract
In nature, the wind always fluctuates in magnitude. Hence, it is essential to consider the adaptability and durability of wind energy harvesters. This paper proposes a passively adaptive piezoelectric wind energy harvester with a double-airfoil bluff body to enhance performance subjected to time-varying wind velocity. The proposed double-airfoil bluff body is inspired by the fact that the attack angle can significantly affect the aerodynamic characteristics of the airfoil. An associated aero-electromechanical model is numerically developed to investigate the influence of the attack angle on the energy harvesting performance. Based on the aero-electromechanical model, the numerical results demonstrate three typical working modes that appear under different attack angles: vortex-induced vibration, galloping, and vibration suppression. These working modes can promise the proposed harvester to effectively and safely scavenge ambient wind energy. The physical mechanisms behind the three working modes are thoroughly explored given the work-energy principle and evolution of the vortex structure. The performance enhancement of the proposed harvester can be attributed to the positive aerodynamic work and an airfoil dynamic stall. Experiments are thereafter conducted to validate the theoretical results. Compared to the conventional galloping-based harvester with a square prism, the maximum voltage improvement percentage of the proposed harvester is over 62.3% within the investigated wind speed range when the attack angle is set to 10°.
Keywords
URL[Source Record]
Indexed By
Language
English
Important Publications
ESI Highly Cited Papers
SUSTech Authorship
First ; Corresponding
Funding Project
National Natural Science Foundation of China[52005242];
WOS Research Area
Engineering
WOS Subject
Engineering, Mechanical
WOS Accession No
WOS:000868295300002
Publisher
ESI Research Field
ENGINEERING
Scopus EID
2-s2.0-85138480369
Data Source
Scopus
Citation statistics
Cited Times [WOS]:5
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/402615
DepartmentDepartment of Mechanics and Aerospace Engineering
Affiliation
1.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering,Shenzhen University,Shenzhen,518060,China
3.Department of Civil and Environmental Engineering,Shantou University,Shantou,515063,China
First Author AffilicationDepartment of Mechanics and Aerospace Engineering
Corresponding Author AffilicationDepartment of Mechanics and Aerospace Engineering
First Author's First AffilicationDepartment of Mechanics and Aerospace Engineering
Recommended Citation
GB/T 7714
Liu,Jinlong,Bao,Bin,Chen,Jiatong,et al. Passively adaptive wind energy harvester featuring a double-airfoil bluff body with adjustable attack angles[J]. MECHANICAL SYSTEMS AND SIGNAL PROCESSING,2023,185.
APA
Liu,Jinlong,Bao,Bin,Chen,Jiatong,Wu,Yufei,&Wang,Quan.(2023).Passively adaptive wind energy harvester featuring a double-airfoil bluff body with adjustable attack angles.MECHANICAL SYSTEMS AND SIGNAL PROCESSING,185.
MLA
Liu,Jinlong,et al."Passively adaptive wind energy harvester featuring a double-airfoil bluff body with adjustable attack angles".MECHANICAL SYSTEMS AND SIGNAL PROCESSING 185(2023).
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