The Effects of Spring Stiffness on Vortex-Induced Vibration for Energy Generation

9th Curtin University of Technology Science and Engineering International Conference 2014

自然科学;工业技术

Zahari, M.^1 ; Chan, H.B.^1 ; Yong, T.H.^1 ; Dol, S.S.^1

Department of Mechanical Engineering, Curtin University Sarawak Campus, Sarawak, Miri

98009, Malaysia^1

关键词: Amplitude of oscillation;    Energy generations;    Frequency ratios;    Generate electricity;    Maximum amplitude;    Spring stiffness;    Turbulent motion;    Vortex-induced vibration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/78/1/012041/pdf
DOI  :  10.1088/1757-899X/78/1/012041

来源: IOP

【 摘 要 】

Vortex-induced vibration (VIV) is the turbulent motion induced on bluff body that generates alternating lift forces and results in irregular movement of the body. VIV-powered system seems a good idea in greening the energy sector and most importantly is its ability to take advantages of low current speed of water to generate electricity. This paper aims to investigate the effects of spring stiffness on the characteristic of VIV. The study is important in order to maximize these potentially destructive vibrations into a valuable resource of energy. Five cylinders with the range of 0.25 to 2.00 inch diameter are tested to study the behavior of VIV. Results from this experiment indicates that, the 2.0 inch cylinder gave the lowest error in frequency ratio which is 1.1% and have a high potential of lock-in condition to occur. In term of maximum amplitude, this cylinder gave the highest amplitude of oscillation motion that is equal to 0.0065 m.