首页|Energy Harvesting in the Wake of An Inverted C-Shaped Bluff Body

Energy Harvesting in the Wake of An Inverted C-Shaped Bluff Body

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This paper proposes a novel wake-induced vibration(WIV)-based energy harvesting system consisting of two bluff bodies.An inverted C-shaped bluff body is stationary installed at the upstream position to generate an interference wake street,and a cylinder bluff body equipped with a transducer is elastically suspended at the downstream position to harness WIV energy.The hydrodynamics and energy harvesting(EH)performance of the proposed system are investigated via experimental studies.The reduced velocity(U*)ranging from 2 to 14(the corresponding Reynolds number ranging from 15100 to 106200)is considered in the present study.It is found that the wake generated by the inverted C-shaped bluff body significantly affects the EH performance.Enlarging the opening angle(α)of the C-shaped bluff body increases the vibration amplitude of the downstream cylinder,thereby increasing the harvested power.When the spacing(L)between two bluff bodies is two times the cylinder diameter(D),the wake-induced vibration(WIV)mode is observed,while the combined WIV and wake galloping(WG)mode occurs when α is 150°,and L equals 3D or 4D.The average drag coefficient becomes negative when L is 2D,3D,or 4D.By carefully configuring a C-shaped bluff body,the wake generated by it can bring an augmenting effect on the vibration of the downstream EH cylinder.For example,the RMS power output of the proposed EH system reaches a maximum of 0.31 W at U*= 8 and L =4D,which is 300％ greater than that of its traditional counterpart.Furthermore,after a number of case stud-ies,it is identified that the proposed EH system can achieve the best performance when α is 150°and L=2D.

wake-induced vibrationvortex-induced vibrationgallopingenergy harvestingbluff body

WANG Jun-lei、LI Shen-fang、Md.Mahbub ALAM、ZHU Hong-jun、HU Guo-biao

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School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450000,China

Center for Turbulence Control,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China

Internet of Things Thrust,The Hong Kong University of Science and Technology(Guangzhou),Guangzhou 511400,China

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国家自然科学基金国家自然科学基金国家自然科学基金Open Project of Henan Key Laboratory of Intelligent Manufacturing of Mechanical Equipment,Zhengzhou University of Light IndustryNatural Science Foundation of Excellent Youth of Henan ProvinceScience and Technology Research&Development Joint Foundation of Henan Province-Young ScientistsProgram for Science&Technology Innovation Talents in Universities of Henan ProvinceNational Center for International Research of Subsea Engineering Technology and Equipment

519771965227722752305135IM20230222230042007622520081009923HASTIT0103132023366

2024

10.1007/s13344-024-0006-1

中国海洋工程(英文版)
中国海洋学会

中国海洋工程(英文版)

CSTPCDEI
影响因子：0.338
ISSN：0890-5487
年,卷(期)：2024.38(1)
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