Passively adaptive wind energy harvester featuring a double-airfoil bluff body with adjustable attack angles
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°.
ESI Highly Cited Papers
First ; Corresponding
National Natural Science Foundation of China;
|WOS Research Area|
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:10
|Document Type||Journal Article|
|Department||Department of Mechanics and Aerospace Engineering|
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 Affilication||Department of Mechanics and Aerospace Engineering|
|Corresponding Author Affilication||Department of Mechanics and Aerospace Engineering|
|First Author's First Affilication||Department of Mechanics and Aerospace Engineering|
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.
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.
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).
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.