Abstract
As a kind of renewable energy, tidal current energy has a good perspective of application. Promoting the use of tidal current energy to reduce the use of fossil fuels is an effective way to alleviate the global warming. Considering relatively low speed tidal current in most of China sea areas, concept of a new type of tidal current energy converter using artificial muscle based on vortex induced vibration (VIV) was put forward in this paper. By vortex induced vibrating the kinetic energy of sea water was converted to kinetic energy of the motion parts of the converter then converted to electric energy by dielectric elastomer. Principle of VIV was given, mathematical model of the vibration system was studied by theoretical analysis and numerical simulation, model test was performed and the results showed agreement with simulation. Basic performance test of the dielectric elastomer was also elaborates in this paper, as well as some brief description of the next step of relative research work.
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Abbreviations
- \(f_{s}\) :
-
Vortex shedding frequency, Hz
- \(f_{n}\) :
-
Natural frequency, Hz
- \(m\) :
-
Mass, kg
- \(k\) :
-
Spring stiffness, N/m
- \(U\) :
-
Free-stream fluid velocity, m/s
- \(\rho\) :
-
Density, kg/m3
- \(\mu\) :
-
Fluid dynamic viscosity, N·s/m2
- D :
-
Cylinder diameter, m
- \(y\) :
-
Displacement, m
- \(\dot{y}\) :
-
Velocity, m/s
- ӱ :
-
Acceleration, \({\text{m} \mathord{\left/ {\vphantom {\text{m} {\text{s}^{2} }}} \right. \kern-0pt} {\text{s}^{2} }}\)
- \(C_{d}\) :
-
Drag coefficient, L/(qs)
- \(C_{{\text{LE}}}\) :
-
Vortex-induced force component, F
- \(\omega_{s}\) :
-
Oscillation angular frequency, rad/s
- \(\xi_{s}\) :
-
Damping ratio
- \(A_{max}\) :
-
Maximum amplitude, m
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Acknowledgments
The project supported by national natural science foundation of China (grant no. 51176175). The authors are grateful for the financial support.
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Wu, S., Yuan, P., Wang, S., Tan, J., Chen, D., Rauf, O. (2017). Research on Tidal Current Energy Converter Using Artificial Muscles and VIV Theory. In: Zhang, X., Dincer, I. (eds) Energy Solutions to Combat Global Warming. Lecture Notes in Energy, vol 33. Springer, Cham. https://doi.org/10.1007/978-3-319-26950-4_9
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DOI: https://doi.org/10.1007/978-3-319-26950-4_9
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