Article
Engineering, Marine
Kun Lei, Zhiqiang Sun
Summary: This study proposes a specially designed semicircular wall to harvest energy from ambient air, which is crucial for sustaining low-power electronic devices under autonomous conditions. Experimental results show that the aspect ratio and nondimensional afterbody length of the wall have a significant impact on the performance of the energy harvester. Within a certain range, the harvester can operate efficiently under variable wind speed conditions, and an appropriate afterbody length is required for high-level power outputs. These findings provide beneficial suggestions for developing coupled VIV-galloping energy harvesters.
Article
Thermodynamics
Weilin Liao, Zijian Huang, Hu Sun, Xin Huang, Yiqun Gu, Wentao Chen, Zhonghua Zhang, Junwu Kan
Summary: The numerical study investigates the effect of the downstream plate on the vortex-induced vibration (VIV) of the cylinder using the fluid-structure interaction method. The cylinder's dynamic characteristics are analyzed based on the plate height and gap length between the plate and the cylinder. The study reveals the transition from VIV to galloping and the enhancement of vibration under plate interference.
Article
Multidisciplinary Sciences
Zhiqing Li, Kaihua Liu, Chaoyang Zhao, Bo Zhou, Yaowen Yang, Guiyong Zhang
Summary: By connecting traditional vortex-induced vibration (VIV) and galloping wind energy harvesters, a new hybrid wind piezoelectric energy harvester (HWPEH) is proposed, which inherits the advantages of both traditional harvesters, i.e., reducing the cut-in wind speed and having a wide working bandwidth.
Article
Engineering, Mechanical
Junlei Wang, Shanghao Gu, Daniil Yurchenko, Guobiao Hu, Ronghan Wei
Summary: This paper discusses the harnessing of aerokinetic energy in flue systems and explores the impact of ash deposition on flow-induced vibration energy harvesting performance. Wind tunnel experiments and computational fluid dynamics (CFD) simulations were conducted to investigate the energy harvesting performance using different ash deposition patterns. The results show that the bell-shaped bluff body suppresses flow-induced vibration and deteriorates energy harvesting performance, while the horn-like bluff body improves energy harvesting by reducing the galloping cut-in wind speed and increasing voltage output. The CFD analysis reveals that the appearance of smallscale secondary vortices widens the wake flow and increases the aerodynamic force produced by the horn-like bluff body. Overall, the unfavorable ash deposition phenomenon in flue systems shows potential for promoting flow-induced vibration energy harvesting.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Physics, Applied
Yuansheng Wang, Zhiyong Zhou, Weiyang Qin, Pei Zhu
Summary: This paper introduces a wind energy harvester that combines VIV, galloping, and multi-stability, demonstrating through validation experiments its ability to maintain a large output in variable-speed wind environments.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Thermodynamics
Zhiyong Zhou, Weiyang Qin, Pei Zhu, Wenfeng Du
Summary: The novel multi-stable harvester aims to scavenge more energy from variable-speed wind by integrating galloping and vortex-induced vibration. Adjusting the distance between magnets can create bi-stability or tri-stability, with the tri-stable configuration outperforming the bi-stable one in wind energy harvesting performance. The tri-stable energy harvester can significantly enhance output voltage and generate large outputs by executing snap-through motions for wind speeds above 1.0 m s(-1).
Article
Instruments & Instrumentation
Junlei Wang, Shanghao Gu, Abdessattar Abdelkefi, Chandan Bose
Summary: This study aimed to enhance piezoelectric energy harvesting from the flow-induced vibration of a circular cylinder by using two symmetric splitters. The research found that the energy harvesting efficiency varied with different positions of the dual splitters, with the optimal position at 60 degrees showing a maximum output voltage increase of 188.61%. Additionally, the study examined the influence of vortex interactions on the transition from VIV to galloping.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Thermodynamics
Kun Wang, Wei Xia, Jiayuan Ren, Weiwei Yu, Haocheng Feng, Shuling Hu
Summary: This study investigates the environmental adaptation of wind energy harvesters by mimicking the fluttering of leaves. Through aeroelastic modeling and laboratory testing of Palm leaves, the mechanism of leaf flutter is understood and an artificial leaf wind energy harvester is designed and tested in a wind tunnel. The study highlights the bio-inspired design of wind energy harvesters with low cut-in wind speed and stable output frequency.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
V Tamimi, J. Wu, M. J. Esfehani, M. Zeinoddini, S. T. O. Naeeni
Summary: This empirical study compares the energy performance of a self-sustained NACA 0015 hydrofoil with oscillators based on Vortex-Induced Vibration (VIV), galloping, and Wake-Induced Vibration (WIV). It is found that oscillators with instability and combined instability-resonance responses have the top energy harvesting performances.
Article
Engineering, Mechanical
Hai-Tao Li, He Ren, Fan Cao, Wei-Yang Qin
Summary: A novel galloping energy harvester is proposed in this study to improve the energy harvesting performance in low-speed wind environments through the use of two types of magnetic effect. The harvester can be divided into three versions based on the number and location of fixed magnets, namely the linear monostable galloping energy harvester (L-GEH), the wake monostable galloping energy harvester (WM-GEH), and the improved monostable galloping energy harvester (IM-GEH). Comparative analysis through numerical and experimental studies shows that the IM-GEH significantly reduces the critical galloping wind speed and increases the output power compared to the L-GEH and WM-GEH. Parameter analysis and computational fluid dynamics (CFD) analysis are conducted to understand the relationship between wind speed, galloping frequency, and performance enhancement mechanism.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Physics, Applied
Shun Chen, Chun H. Wang, Liya Zhao
Summary: A two-degree-of-freedom piezoelectric aeroelastic energy harvester is proposed to improve wind energy harvesting performance by utilizing both vortex-induced vibration and wake galloping mechanisms. The harvester overcomes the limitations of conventional one-degree-of-freedom energy harvesters and efficiently extracts wind energy in a wide wind speed range.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Mechanical
Weilin Liao, Yijie Wen, Junwu Kan, Xin Huang, Shuyun Wang, Zhe Li, Zhonghua Zhang
Summary: This paper proposes a joint-nested structure piezoelectric energy harvester (JNS-PWEH) to improve the weak power generation performance of existing harvesters. Experimental results show that the performance of the JNS-PWEH has been significantly improved and further optimization of the structure can enhance the output performance. Therefore, the joint nested structure is of great importance in enhancing indirect-excitation piezoelectric energy harvesters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Green & Sustainable Science & Technology
Hongrae Park, Andreas P. Mentzelopoulos, Michael M. Bernitsas
Summary: New Passive Turbulence Control (PTC), consisting of large turbulence stimulators, is experimentally tested on circular cylinders on springs to harness marine hydrokinetic energy from slow flows. The study investigates the effect of PTC on the onset of Flow-Induced Oscillations (FIO) and particularly the relative onset of Vortex-Induced Vibrations (VIV) and galloping. Results show that PTC placement at different angles and heights impacts the amplitude and initiation of FIO, VIV, and galloping, with lower spring stiffness and larger PTC enabling power generation at low current speeds.
Article
Chemistry, Physical
Lanbin Zhang, Bo Meng, Yun Tian, Xiangkai Meng, Xiaobo Lin, Yixiang He, Chenyang Xing, Huliang Dai, Lin Wang
Summary: In this study, a novel vortex-induced vibration (VIV) based triboelectric nanogenerator (TENG) is proposed for efficient energy harvesting from low-speed wind. A theoretical model is constructed and validated by experiments to investigate the vibration response and output voltage of the VIV-TENG varying with wind speed. It is found that there is a lock-in region with large vibration amplitude and output voltage. Furthermore, a new model of tandem vortex-induced vibration TENG is designed to broaden the lock-in region.
Article
Engineering, Marine
Kun Lei, Zhiqiang Sun
Summary: Coupling vortex-induced vibration (VIV) and galloping can enhance the performance of VIV-based piezoelectric wind energy harvesters (PWEHs). In this study, the wake evolution from VIV to galloping was induced by employing upstream bluff bodies, and the effects of wind speed, spacing ratio, and cross-section of upstream bluff body on the output performance of the PWEH were experimentally examined. The findings provide beneficial guidance for developing efficient VIV and galloping coupled energy harvesters.
Article
Engineering, Mechanical
Emmanuel Virot, Xavier Amandolese, Pascal Hemon
JOURNAL OF FLUIDS AND STRUCTURES
(2016)
Article
Mathematics, Interdisciplinary Applications
Emmanuel Virot, Davide Faranda, Xavier Amandolese, Pascal Hemon
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
(2017)
Article
Engineering, Mechanical
Pascal Hemon, Xavier Amandolese, Thomas Andrianne
JOURNAL OF FLUIDS AND STRUCTURES
(2017)
Article
Multidisciplinary Sciences
Loic Tadrist, Marc Saudreau, Pascal Hemon, Xavier Amandolese, Andre Marquier, Tristan Leclercq, Emmanuel de langre
JOURNAL OF THE ROYAL SOCIETY INTERFACE
(2018)
Article
Agronomy
Adelin Barbacci, Julien Diener, Pascal Hemon, Boris Adam, Nicolas Dones, Lionel Reveret, Bruno Moulia
AGRICULTURAL AND FOREST METEOROLOGY
(2014)
Article
Mechanics
Xavier Amandolese, Pascal Hemon
COMPTES RENDUS MECANIQUE
(2010)
Article
Mathematics, Applied
X. Amandolese, P. Hemon, S. Manzoor
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2013)
Article
Mechanics
S. Dupont, F. Gosselin, C. Py, E. de langre, P. Hemon, Y. Brunet
JOURNAL OF FLUID MECHANICS
(2010)
Article
Engineering, Mechanical
S. Manzoor, P. Hemon, X. Amandolese
JOURNAL OF FLUIDS AND STRUCTURES
(2011)
Article
Engineering, Mechanical
Emmanuel Virot, Xavier Amandolese, Pascal Hemon
JOURNAL OF FLUIDS AND STRUCTURES
(2013)
Article
Construction & Building Technology
Oyvind Mortveit Ellingsen, Olivier Flamand, Xavier Amandolese, Francois Coiffet, Pascal Hemon
Summary: This paper introduces a field test on a slender chimney near the Atlantic coast of France, highlighting VIV events of low to moderate amplitude and significant influence of wind direction on vibration amplitude.
STRUCTURAL ENGINEERING INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Oyvind Mortveit Ellingsen, Xavier Amandolese, Olivier Flamand, Pascal Hemon
Summary: This study presents a wind tunnel experiment on a large smooth circular cylinder mounted between walls. The Reynolds number range of interest is [800 000 - 2 170 000]. By analyzing the unsteady wall pressure distributions, twin Strouhal numbers corresponding to the second and fourth terms of the decomposition are detected. These terms are found to contribute to the unsteady lift on the cylinder, with the second term having the main influence and a Strouhal number similar to those found at subcritical Reynolds numbers.
JOURNAL OF FLUIDS AND STRUCTURES
(2022)
Article
Sport Sciences
Pascal Hemon
SPORTS ENGINEERING
(2018)
Article
Construction & Building Technology
Pascal Hemon
WIND AND STRUCTURES
(2015)