RESEARCH PROGRESS OF PIEZOELECTRIC WIND ENERGY HARVESTERS BASED ON VORTEX-INDUCED VIBRATION
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摘要: 近年来, 随着物联网、无线传感器网络和便携式医疗设备的迅速发展, 如何为这些独立设备提供可靠、清洁和自给的能源成为其发展的关键. 传统的化学电池不仅寿命有限, 而且庞大的电池数量带来了高昂的维护成本, 废弃后的电池还会给环境保护带来更大的负担. 自然环境中风能分布广泛、储藏量大且无污染, 是绿色可再生能源. 将风能转换为电能是目前能源利用的重点. 然而, 涡轮风力发电机投资巨大、对风场要求高、占地面积大、维修困难, 同时产生的噪声和生态问题日益突出. 目前, 如何利用新材料和简单结构实现低速风能的高效收集正在成为国内外研究的热点. 基于涡激振动的微型风能收集器是目前较为有效的风能收集技术之一, 有望实现分散分布的无线传感器自供电. 文章从涡激振动能量收集器的工作原理、研究进展、效率提升方法等方面综述了涡激振动能量收集器的研究现状. 着重讨论了钝体形态优化、非线性特性引入、多风向风能收集结构设计和混合风能收集器设计等增强方案对涡激振动风能收集器性能的影响, 为高性能涡激振动能量收集器的设计提供参考. 最后, 对涡激振动风能收集器面临的关键问题与难点进行了分析和总结, 并对今后的研究方向和未来的发展前景进行了展望.Abstract: In recent decades, with the rapid developments of IoT, there appear lots of independent low-energy -consumption electronic devices, e.g., the wireless sensors, portable medical devices, and microelectronic systems, how to provide reliable, clean and self-sufficient power for these devices is posing a great challenge. Providing power to distributed electronic devices through traditional chemical batteries is proving to be difficult. These batteries inherently possess a limited operational lifespan, and the exponential increase in the number of micro-electronic systems has consequently made replacement costs rise dramatically. Moreover, the disposal of the used batteries poses significant risks to the natural environment. In contrast, wind energy is a green energy, it also has advantages such as extensive distribution, substantial storage capacity, and non-pollution. Consequently, harvesting wind energy and converting it into electric energy have attracted wide attention. However, the current scheme of turbine generator is exhibiting some defects, e.g., it requires a great amount of capital, demands a place featuring plenty wind, produces noise in working, covers a large area, and poses a threaten to wildlife. Thus, how to harvest low-speed wind energy efficiently with simple and cheap structures becomes a hot topic of research. Wind energy harvesting based on vortex-induced vibration is emerging as one of the most attractive technologies. It is considered as a potential solution to realize self-powering of the distributed wireless sensors in IoT. In this paper, the research progress of vortex-induced vibration energy harvester is introduced from the aspects of working principle, research progress and promotion schemes. We review and discuss the effects of enhancing schemes, such as optimization of bluff body, introducing nonlinear restoring force, and designs of multidirectional and hybrid harvester, on the energy harvesting performance of vortex-induced vibration wind energy harvester. This review may provide a reference for the design of vortex-induced vibration energy harvesters and improvement of harvesting performance. Finally, according to the current research status, the key challenges are summarized and consulted. The future research direction and prospect are presented and discussed.
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Key words:
- vortex-induced vibration /
- wind energy harvesting /
- bluff body /
- piezoelectric effect
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图 2 (a) 4种突出的超表面图形[59]; (b)几种凹陷的超表面图形[60]; (c)安装对称分流板的风能收集器[61]; (d)安装非对称分流板的风能收集器[62]
Figure 2. (a) Four prominent metasurface patterns [59]; (b) Several kinds of dented meta-surface patterns [60]; (c) Wind energy harvester with two symmetric splitting plates [61]; (d) Wind energy harvester with two asymmetrical splitting plates [62]
图 3 (a)变截面钝体的风能收集器[63]; (b)钝体前部含V型槽的风能收集器[64]; (c)使用六瓣型圆柱钝体的风能收集器[65]
Figure 3. (a) Wind energy harvester owning a bluff body with variable sections [63]; (b) Wind energy harvester owning a bluff body with V-shaped groove at the front [64]; (c) Wind energy harvester with six-petal cylinder bluff body [65]
图 4 (a)新型双稳态压电风能收集器[70]; (b)附着非线性旋转重力摆的风能收集器[71]; (c)新型多稳态涡激−驰振风能收集器[72]; (d)双稳态涡激−驰振风能收集器[73]; (e)磁耦合弯曲−扭转风能收集器[74]; (f)磁耦合间接激励风能收集器[75]
Figure 4. (a) Bi-stable piezoelectric wind energy harvester [70]; (b) Wind energy harvester with non-linear rotating gravity pendulum [71]; (c) Multi-stable wind energy harvester integratinggalloping and vortex-induced vibration [72]; (d) Bi-stable wind energy harvester integrating vortex-induced vibration and galloping[73]; (e) Magnetically coupling bending-torsion wind energy harvester [74]; (f) Wind energy harvester by magnetic force coupling [75]
图 5 (a)具有正交双梁的压电风能收集器[79]; (b)全风向压电风能收集器[80]; (c)磁耦合双向风能收集器[81]; (d)可旋转的方向自适应的风能收集器[82]; (e)双圆柱风向自适应型风能收集器[83]
Figure 5. (a) Piezoelectric wind energy harvester with orthogonal bi-beam [79]; (b) In-plane omnidirectional piezoelectric wind energy harvester [80]; (c) Bi-directional energy harvester with magnetic interaction [81]; (d) Rotating and direction-adaptive wind energy harvester [82]; (e) Direction-adaptive wind energy harvester fitted with double cylinders [83]
图 6 (a)具有混合钝体的风能收集器[84]; (b)双圆柱二自由度风能收集器[85]; (c)涡激颤振耦合的压电风能收集器[86]; (d)混合压电-介电风能收集器[29]; (e)压电−电磁混合风能收集器[76]; (f)压电−电磁混合风能收集器[87]
Figure 6. (a) Wind energy harvester with hybridized bluff bodies [84]; (b) 2-DOF aeroelastic wind energy harvester with double cylinders [85]; (c) Piezoelectric energy harvester by vortex-induced flutter coupling [86]; (d) Hybrid piezo-dielectric wind energy harvester [29]; (e) Piezo-electromagnetic hybrid wind energy harvester [76]; (f) Hybrid piezoelectric and electromagnetic wind energy harvester [87]
图 8 (a)圆柱壳与菱形挡板相互作用的风能收集器[91]; (b)布置矩形扰流板的嵌套结构压电风能收集器[92]; (c)布置下游扰流板的风能收集器[93]; (d)双钝体间接激励风能收集器[94]
Figure 8. (a) Wind energy harvester by interaction of cylindrical shell and diamond-shaped baffle [91]; (b) Joint-nested structure piezoelectric energy harvester with rectangle-shaped spoiler [92]; (c) Wind energy harvester with downstream baffle [93]; (d) Wind energy harvester with two bluff bodies [94]
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[1] Morel A, Charleux L, Demouron Q, et al. Simple analytical models and analysis of bistable vibration energy harvesters. Smart Materials and Structures, 2022, 31(10): 105016 [2] Buccolini L, Conti M. An energy harvester interface for self-powered wireless speed sensor. IEEE Sensors Journal, 2017, 17(4): 1097-1104 doi: 10.1109/JSEN.2016.2635940 [3] Saha K, Chatterjee A, Das A, et al. Self-powered ionic tactile sensors. Journal of Materials Chemistry C, 2023, 11(24): 7920-7936 doi: 10.1039/D2TC05109E [4] Zeng XL, Peng RH, Fan ZY, et al. Self-powered and wearable biosensors for healthcare. Materials Today Energy, 2022, 23: 100900 [5] Xu JH, Wei XL, Li RN, et al. A capsule-shaped triboelectric nanogenerator for self-powered health monitoring of traffic facilities. Acs Materials Letters, 2022, 4(9): 1630-1637 doi: 10.1021/acsmaterialslett.2c00477 [6] Pan HY, Qi LF, Zhang ZT, et al. Kinetic energy harvesting technologies for applications in land transportation: A comprehensive review. Applied Energy, 2021, 286: 116518 [7] Qin Z, Tang XR, Wu YT, et al. Advancement of tidal current generation technology in recent years: A review. Energies, 2022, 15(21): 8042 [8] Blaabjerg F, Ma K. Wind energy systems. Proceedings of the IEEE, 2017, 105(11): 2116-2131 doi: 10.1109/JPROC.2017.2695485 [9] Kabir E, Kumar P, Kumar S, et al. Solar energy: Potential and future prospects. Renewable & Sustainable Energy Reviews, 2018, 82: 894-900 [10] Van der Zwaan B, Dalla LF. Integrated assessment projections for global geothermal energy use. Geothermics, 2019, 82: 203-211 doi: 10.1016/j.geothermics.2019.06.008 [11] Huang DM, Zhou SX, Han Q, et al. Response analysis of the nonlinear vibration energy harvester with an uncertain parameter. Proceedings of the Institution of Mechanical Engineers Part K-Journal of Multi-Body Dynamics, 2020, 234(2): 393-407 doi: 10.1177/1464419319893211 [12] Msigwa G, Ighalo JO, Yap PS. Considerations on environmental, economic, and energy impacts of wind energy generation: Projections towards sustainability initiatives. Science of the Total Environment, 2022, 849: 157755 [13] Pathak S, Zhang R, Gayen B, et al. ultra-low friction self-levitating nanomagnetic fluid bearing for highly efficient wind energy harvesting. Sustainable Energy Technologies and Assessments, 2022, 52: 102024 [14] 李耀华, 孔力. 发展太阳能和风能发电技术 加速推进我国能源转型. 中国科学院院刊. 2019, 34(04): 426-433Li Yaohua, Kong Li. Developing solar and wind power generation technology to accelerate China's energy transformation. Bulletin of the Chinese Academy of Sciences, 2019, 34(4): 426-433 (in Chinese)) [15] 杨茂, 杨琼琼. 风电机组风速−功率特性曲线建模研究综述. 电力自动化设备. 2018, 38(2): 34-43Yang Mao, Yang Qiongqiong. Review of modeling of wind speed-power characteristic curve for wind turbine. Electric Power Automation Equipment, 2018, 38(2): 34-43 (in Chinese)) [16] Karasmanaki E. Is it safe to live near wind turbines? Reviewing the impacts of wind turbine noise. Energy for Sustainable Development, 2022, 69: 87-102 doi: 10.1016/j.esd.2022.05.012 [17] Lloyd JD, Butryn R, Pearman-Gillman S, et al. Seasonal patterns of bird and bat collision fatalities at wind turbines. PLOS One, 2023, 18(5): e0284778 [18] Rehling F, Delius A, Ellerbrok J, et al. Wind turbines in managed forests partially displace common birds. Journal of Environmental Management, 2023, 328: 116968 [19] Zhang LB, Abdelkefi A, Dai HL, et al. Design and experimental analysis of broadband energy harvesting from vortex-induced vibrations. Journal of Sound and Vibration, 2017, 408: 210-219 [20] Li HT, Ren H, Cao F, et al. Improving the galloping energy harvesting performance with magnetic coupling. International Journal of Mechanical Sciences, 2023, 237: 107785 [21] Tcho IW, Kim WG, Kim JK, et al. A flutter-driven triboelectric nanogenerator for harvesting energy of gentle breezes with a rear-fixed fluttering film. Nano Energy, 2022, 98: 107197 [22] Liu Y, Ding LB, Dai L, et al. All-ceramic flexible piezoelectric energy harvester. Advanced Functional Materials, 2022, 32(52): 2209297 [23] Sheng WQ, Xiang HJ, Zhang ZW, et al. High-efficiency piezoelectric energy harvester for vehicle-induced bridge vibrations: Theory and experiment. Composite Structures, 2022, 299: 116040 [24] Cao YS, Li JR, Sha AM, et al. A power-intensive piezoelectric energy harvester with efficient load utilization for road energy collection: Design, testing, and application. Journal of Cleaner Production, 2022, 369: 133287 [25] Yu J, Li DC, Li SB, et al. Electromagnetic vibration energy harvester using magnetic fluid as lubricant and liquid spring. Energy Conversion and Management, 2023, 286: 117030 [26] Pyo S, Kwon DS, Ko HJ, et al. Frequency up-conversion hybrid energy harvester combining piezoelectric and electromagnetic transduction mechanisms. International Journal of Precision Engineering and Manufacturing-Green Technology, 2022, 9(1): 241-251 doi: 10.1007/s40684-021-00321-y [27] Ge XH, Hu N, Yan FJ, et al. Development and applications of electrospun nanofiber-based triboelectric nanogenerators. Nano Energy, 2023, 112: 108444 [28] Yuan W, Zhang CG, Zhang BF, et al. Wearable, breathable and waterproof triboelectric nanogenerators for harvesting human motion and raindrop energy. Advanced Materials Technologies, 2022, 7(6): 2101139 [29] Lai ZH, Wang SB, Zhu LK, et al. A hybrid piezo-dielectric wind energy harvester for high-performance vortex-induced vibration energy harvesting. Mechanical Systems and Signal Processing, 2021, 150: 107212 [30] 杜小振, Mbango-Ngoma PA, 常恒等. 流致涡激振动压电发电风能采集技术模拟研究. 振动与冲击. 2022, 41(23): 168-174, 200Du Xiaozhen, Mbango-Ngoma PA, Chang Heng, et al. Wind energy collection technology simulation with flow-induced VIV piezoelectric film for power generation. Journal of Vibration and Shock, 2022, 41(23): 168-174, 200 (in Chinese)) [31] Zheng XT, He LP, Wang SJ, et al. A review of piezoelectric energy harvesters for harvesting wind energy. Sensors and Actuators a-Physical, 2023, 352: 114190 [32] Wang JL, Geng LF, Ding L, et al. The state-of-the-art review on energy harvesting from flow-induced vibrations. Applied Energy, 2020, 267: 114902 [33] Dai HL, Abdelkefi A, Wang L. Theoretical modeling and nonlinear analysis of piezoelectric energy harvesting from vortex-induced vibrations. Journal of Intelligent Material Systems and Structures, 2014, 25(14): 1861-1874 [34] Ma XQ, Zhou SX. A review of flow-induced vibration energy harvesters. Energy Conversion and Management, 2022, 254: 115223 [35] Kou JQ, Zhang WW, Liu YL, et al. The lowest reynolds number of vortex-induced vibrations. Physics of Fluids, 2017, 29(4): 041701 [36] Martins FAC, Avila JPJ. Effects of the reynolds number and structural damping on vortex-induced vibrations of elastically-mounted rigid cylinder. International Journal of Mechanical Sciences, 2019, 156: 235-249 [37] Zhang MJ, Yu HY, Ying XY. Incorporation of subcritical reynolds number into an aerodynamic damping model for vortex-induced vibration of a smooth circular cylinder. Engineering Structures, 2021, 249: 113325 [38] Zhang MJ, Zhang CY, Abdelkefi A, et al. Piezoelectric energy harvesting from vortex-induced vibration of a circular cylinder: Effect of reynolds number. Ocean Engineering, 2021, 235: 109378 [39] Cheng Z, Lien FS, Yee E, et al. Vortex-induced vibration of a circular cylinder with nonlinear restoring forces at low-reynolds number. Ocean Engineering, 2022, 266: 113197 [40] Mehdipour I, Madaro F, Rizzi F, et al. Comprehensive experimental study on bluff body shapes for vortex-induced vibration piezoelectric energy harvesting mechanisms. Energy Conversion and Management-X, 2022, 13: 100174 [41] Karimzadeh A, Roohi R, Akbari M. Size-dependent behavior of micro piezoelectric viv energy harvester: Parametric study and performance analysis. Applied Ocean Research, 2022, 127: 103296 [42] Alam MdM. Effects of mass and damping on flow-induced vibration of a cylinder interacting with the wake of another cylinder at high reduced velocities. Energies, 2021, 14(16): 5148 [43] Ambrozkiewicz B, Czyz Z, Karpinski P, et al. Ceramic-based piezoelectric material for energy harvesting using hybrid excitation. Materials, 2021, 14(19): 5816 [44] Verma M, De A. Dynamics of vortex-induced-vibrations of a slit-offset circular cylinder for energy harvesting at low reynolds number. Physics of Fluids, 2022, 34(8): 083607 [45] Tang BW, Fan XT, Wang JW, et al. Energy harvesting from flow-induced vibrations enhanced by meta-surface structure under elastic interference. International Journal of Mechanical Sciences, 2022, 236: 107749 [46] Jebelli M, Masdari M. Interaction of free oscillating flat plate and viv of a circular cylinder in laminar flow. Journal of Fluids and Structures, 2022, 113: 103648 [47] Ramirez JM. A coupled formulation of fluid-structure interaction and piezoelectricity for modeling a multi-body energy harvester from vortex-induced vibrations. Energy Conversion and Management, 2021, 249: 114852 [48] Zhao X, Zhu WD, Li YH. Closed-form solutions of bending-torsion coupled forced vibrations of a piezoelectric energy harvester under a fluid vortex. Journal of Vibration and Acoustics-Transactions of the Asme, 2022, 144(2): 021010 [49] Lu D, Li Z, Hu G, et al. Two-degree-of-freedom piezoelectric energy harvesting from vortex-induced vibration. Micromachines, 2022, 13(11): 1936 [50] Naseer R, Abdelkefi A. Nonlinear modeling and efficacy of viv-based energy harvesters: Monostable and bistable designs. Mechanical Systems and Signal Processing, 2022, 169: 108775 [51] Huang XB, Zhong TS. Hydrokinetic energy harvesting from flow-induced vibration of a hollow cylinder attached with a bi-stable energy harvester. Energy Conversion and Management, 2023, 278: 116718 [52] Ma XQ, Li ZY, Zhang H, et al. Dynamic modeling and analysis of a tristable vortex-induced vibration energy harvester. Mechanical Systems and Signal Processing, 2023, 187: 109924 [53] Mishra R, Bhardwaj R, Kulkarni SS, et al. Vortex-induced vibration of a circular cylinder on a nonlinear viscoelastic support. Journal of Fluids and Structures, 2021, 100: 103196 [54] Li JJ, Li S, He XF, et al. Geometrically nonlinear model of piezoelectric wind energy harvesters based on vortex-induced vibration and galloping. Smart Materials and Structures, 2022, 31(10): 105019 [55] Zhang LB, Meng B, Tian Y, et al. Vortex-induced vibration triboelectric nanogenerator for low speed wind energy harvesting. Nano Energy, 2022, 95: 107029 [56] Wang SY, Liao WL, Zhang ZH, et al. Development of a novel non-contact piezoelectric wind energy harvester excited by vortex-induced vibration. Energy Conversion and Management, 2021, 235: 113980 [57] Wang JL, Zhang CY, Yurchenko D, et al. Usefulness of inclined circular cylinders for designing ultra-wide bandwidth piezoelectric energy harvesters: Experiments and computational investigations. Energy, 2022, 239: 122203 [58] Azadeh-Ranjbar V, Elvin N, Andreopoulos Y. Vortex-induced vibration of finite-length circular cylinders with spanwise free-ends: Broadening the lock-in envelope. Physics of Fluids, 2018, 30(10): 105104 [59] Wang JL, Sun SK, Tang LH, et al. On the use of metasurface for vortex-induced vibration suppression or energy harvesting. Energy Conversion and Management, 2021, 235: 113991 [60] Wang JL, Zhang Y, Liu M, et al. Etching metasurfaces on bluff bodies for vortex-induced vibration energy harvesting. International Journal of Mechanical Sciences, 2023, 242: 108016 [61] Wang JL, Gu SH, Abdelkefi A, et al. Enhancing piezoelectric energy harvesting from the flow-induced vibration of a circular cylinder using dual splitters. Smart Materials and Structures, 2021, 30(5): 05LT01 [62] Wang JL, Xia B, Yurchenko D, et al. Enhanced performance of piezoelectric energy harvester by two asymmetrical splitter plates. Ocean Engineering, 2023, 270: 113614 [63] Li HT, Ren H, Shang MJ, et al. Dynamics and performance evaluation of a vortex-induced vibration energy harvester with hybrid bluff body. Smart Materials and Structures, 2023, 32(4): 045016 [64] Siritham T, Kittichaikarn C. Effect of a v-shaped groove on the performance of a circular-cylinder energy harvester. Smart Materials and Structures, 2023, 32(3): 035042 [65] Hosseini S, Afsharfard A, Zarkak MR, et al. Increasing vortex-induced vibration-based energy harvesting using a nature-inspired bluff body: An experimental study. European Journal of Mechanics B-Fluids, 2023, 97: 1-11 doi: 10.1016/j.euromechflu.2022.08.002 [66] Li HT, Dong BJ, Cao F, et al. Homoclinic bifurcation for a bi-stable piezoelectric energy harvester subjected to galloping and base excitations. Applied Mathematical Modelling, 2022, 104: 228-242 doi: 10.1016/j.apm.2021.10.050 [67] Xu C, Zhao LY. Investigation on the characteristics of a novel internal resonance galloping oscillator for concurrent aeroelastic and base vibratory energy harvesting. Mechanical Systems and Signal Processing, 2022, 173: 109022 [68] Liao BP, Zhao R, Yu KP, et al. Theoretical and experimental investigation of a bi-stable piezoelectric energy harvester incorporating fluid-induced vibration. Energy Conversion and Management, 2022, 255: 115307 [69] Zhang HW, Qin WY, Zhou ZY, et al. Piezomagnetoelastic energy harvesting from bridge vibrations using bi-stable characteristics. Energy, 2023, 263: 125859 [70] Wu N, He YC, Fu JY, et al. Performance of a bistable flow-energy harvester based on vortex-induced vibration. Journal of Wind Engineering and Industrial Aerodynamics, 2021, 217: 104733 [71] Joy A, Joshi V, Narendran K, et al. Piezoelectric energy extraction from a cylinder undergoing vortex-induced vibration using internal resonance. Scientific Reports, 2023, 13(1): 6924 [72] Zhou ZY, Qin WY, Zhu P, et al. Harvesting more energy from variable-speed wind by a multi-stable configuration with vortex-induced vibration and galloping. Energy, 2021, 237: 121551 [73] Wang YS, Zhou ZY, Qin WY, et al. Harvesting wind energy with a bi-stable configuration integrating vortex-induced vibration and galloping. Journal of Physics D-Applied Physics, 2021, 54(28): 285501 [74] Sui WT, Zhang HR, Yang CQ, et al. Modeling and experimental investigation of magnetically coupling bending-torsion piezoelectric energy harvester based on vortex-induced vibration. Journal of Intelligent Material Systems and Structures, 2022, 33(9): 1147-1160 doi: 10.1177/1045389X211048229 [75] Kan JW, Liao WL, Wang SY, et al. A piezoelectric wind energy harvester excited indirectly by a coupler via magnetic-field coupling. Energy Conversion and Management, 2021, 240: 114250 [76] Hou CW, Li CH, Shan XB, et al. A broadband piezo-electromagnetic hybrid energy harvester under combined vortex-induced and base excitations. Mechanical Systems and Signal Processing, 2022, 171: 108963 [77] Wang JL, Gu SH, Zhang CY, et al. Hybrid wind energy scavenging by coupling vortex-induced vibrations and galloping. Energy Conversion and Management, 2020, 213: 112835 [78] Jooss Y, Ronning EB, Hearst RJ, et al. Influence of position and wind direction on the performance of a roof mounted vertical axis wind turbine. Journal of Wind Engineering and Industrial Aerodynamics, 2022, 230: 105177 [79] Shi TY, Hu G, Zou LH, et al. Performance of an omnidirectional piezoelectric wind energy harvester. Wind Energy, 2021, 24(11): 1167-1179 doi: 10.1002/we.2624 [80] Li S, He XF, Li JJ, et al. An in-plane omnidirectional piezoelectric wind energy harvester based on vortex-induced vibration. Applied Physics Letters, 2022, 120(4): 043901 [81] Su WJ, Wang ZS. Development of a non-linear bi-directional vortex-induced piezoelectric energy harvester with magnetic interaction. Sensors, 2021, 21(7): 2299 [82] Zhang HK, Song RJ, Meng JP, et al. A direction adaptive hybrid piezo-electromagnetic energy harvester based on vortex-induced vibration. Ferroelectrics, 2021, 584(1): 113-120 doi: 10.1080/00150193.2021.1984778 [83] 侯成伟, 单小彪, 宋汝君等. 风向自适应型涡激振动压电俘能器的试验研究. 机械工程学报, 2022, 58(20): 120-127 (Hou Chengwei, Shan Xiaobiao, Song Rujun, et al. Experimental study of orientation adaptive piezoelectric energy harvester based on vortex induced vibration. Journal of Mechanical Engineering, 2022, 58(20): 120-127 (in Chinese) doi: 10.3901/JME.2022.20.120Hou Chengwei, Shan Xiaobiao, Song Rujun, et al. Experimental study of orientation adaptive piezoelectric energy harvester based on vortex induced vibration. Journal of Mechanical Engineering, 2022, 58(20): 120-7. (in Chinese)) doi: 10.3901/JME.2022.20.120 [84] Wang JL, Wang YQ, Hu GB. Investigation of hybridized bluff bodies for flow-induced vibration energy harvesting. Journal of Physics D-Applied Physics, 2022, 55(48): 484001 [85] Chen S, Wang CH, Zhao LY. A two-degree-of-freedom aeroelastic energy harvesting system with coupled vortex-induced-vibration and wake galloping mechanisms. Applied Physics Letters, 2023, 122(6): 063901 [86] Li X, Wang XX, Tian HG, et al. Experimental research of symmetrical airfoil piezoelectric energy harvester excited by vortex-induced flutter coupling. Applied Sciences-Basel, 2022, 12(24): 12514 [87] Al-Riyami M, Bahadur I, Ouakad H. There is plenty of room inside a bluff body: A hybrid piezoelectric and electromagnetic wind energy harvester. Energies, 2022, 15(16): 6097 [88] Du XE, Zhang M, Chang H, et al. Micro windmill piezoelectric energy harvester based on vortex- induced vibration in tunnel. Energy, 2022, 238: 121734 [89] Su B, He SH, Zhang MJ, et al. Experimental study on flow-induced vibration of a circular cylinder with a downstream square plate. Ocean Engineering, 2022, 247: 110768 [90] Wang JL, Zhang CY, Zhang MJ, et al. Enhancing energy harvesting from flow-induced vibrations of a circular cylinder using a downstream rectangular plate: An experimental study. International Journal of Mechanical Sciences, 2021, 211: 106781 [91] Kan JW, Liao WL, Wang J, et al. Enhanced piezoelectric wind-induced vibration energy harvester via the interplay between cylindrical shell and diamond-shaped baffle. Nano Energy, 2021, 89: 106466 [92] Liao WL, Wen YJ, Kan JW, et al. A joint-nested structure piezoelectric energy harvester for high-performance wind-induced vibration energy harvesting. International Journal of Mechanical Sciences, 2022, 227: 107443 [93] Kan JW, Wang J, Meng FX, et al. A downwind-vibrating piezoelectric energy harvester under the disturbance of a downstream baffle. Energy, 2023, 262: 125429 [94] Wang J, Kan JW, Gu YQ, et al. Design, performance evaluation and calibration of an indirectly-excited piezoelectric wind energy harvester via a double-bluffbody exciter. Energy Conversion and Management, 2023, 284: 116969 [95] Liao WL, Zhang ZH, Huang X, et al. A novel magnetic-coupling non-contact piezoelectric wind energy harvester with a compound-embedded structure. IEEE Sensors Journal, 2022, 22(9): 8428-8438 doi: 10.1109/JSEN.2022.3161833 -