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Analysis of overtopping wave energy converters with ramp angle variations using particle-based simulation

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초록

An overtopping wave energy converter (OWEC) is designed to convert the kinetic and potential energies of overtopped waves into electricity. The performance of OWEC is closely influenced by wave characteristics such as wave height and period, un-derscoring the importance of optimizing their design for specific marine environments. This study utilized marine environmental data from the coastal region of Ulleung-eup and conducted numerical simulations using the smoothed particle hydrodynamics method to analyze the overtopping performance of an OWEC under varying design parameters. Four models with different ramp configurations are proposed and evaluated. The hydraulic efficiency, derived from the overtopped flow rate, was used to assess and compare the performance of each model. Among the designs, the model with a ramp angle of 35° demonstrated the best performance. This study offers valuable insights into the optimal ramp design of OWEC for specific marine conditions and emphasizes the need for future studies incorporating three-dimensional simulations and experimental validation.

Abstract

An overtopping wave energy converter (OWEC) is designed to convert the kinetic and potential energies of overtopped waves into electricity. The performance of OWEC is closely influenced by wave characteristics such as wave height and period, un-derscoring the importance of optimizing their design for specific marine environments. This study utilized marine environmental data from the coastal region of Ulleung-eup and conducted numerical simulations using the smoothed particle hydrodynamics method to analyze the overtopping performance of an OWEC under varying design parameters. Four models with different ramp configurations are proposed and evaluated. The hydraulic efficiency, derived from the overtopped flow rate, was used to assess and compare the performance of each model. Among the designs, the model with a ramp angle of 35° demonstrated the best performance. This study offers valuable insights into the optimal ramp design of OWEC for specific marine conditions and emphasizes the need for future studies incorporating three-dimensional simulations and experimental validation.

참고문헌 (12)

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  4. A. S. De Barros, "Numer-ical study and geometrical investigation of an onshore over-topping device wave energy converter with a seabed cou-pled structure", Journal of Marine Science and Engineering, 11(2), pp.412~ (2023)
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  6. S. A. Da Silva, "Constructal design applied to an overtopping wave energy converter locate on Paraná Coast in Brazil", Sustain-able Marine Structures, 6(2), pp.1~14 (2024)
  7. G. G. Kim, "Review of the optimal locations of coastal sea area for operating wave energy con-verter in Korea", Journal of Advanced Marine Engineering and Technology, 46(4), pp.172~181 (2022)
  8. J. J. Monaghan, "Smoothed particle hydrodynamics", An-nual Review of Astronomy and Astrophysics, 30, pp.543~574 (1992)
  9. J. J. Monaghan, "Gravity currents descending a ramp in a stratified tank", Journal of Fluid Mechanics, 379, pp.39~69 (1999)
  10. S. H. An, "Optimal design of overtopping wave energy converter substructure based on smoothed particle hydrodynamics and structural analysis", Journal of the Korean Society of Marine Environ-ment & Safety, 29(7), pp.992~1001 (2023)
  11. F. Biesel, "Etude theorique d'un type d'appa-reil a la houle", La Houille Blanche, 6(2), pp.152~165 (1951)
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