|
Ocean Systems Engineering Volume 15, Number 4, December 2025 , pages 423-439 DOI: https://doi.org/10.12989/ose.2025.15.4.423 |
||
|
Computational analysis of underlip geometry and power take-off damping effects on oscillating water column performance |
||
Muhammad A. Bramantya, Heru S.B. Rocharjo,
Ayodya P. Tenggara and Rahmawan Budiarto
|
||
| Abstract | ||
| The geometry of the underlip in onshore oscillating water column (OWC) systems is a key determinant of their hydrodynamic performance, directly influencing the wave-structure interactions and energy conversion efficiency. Recent advances in experimental hydrodynamics have highlighted the potential of geometric optimization; however, the specific influence of underlip configurations remains underexplored in the context of high-fidelity computational modeling. This study addresses this gap by performing a systematic evaluation of multiple underlip geometries using computational fluid dynamics (CFD) simulations. The analysis revealed that subtle geometric modifications could yield substantial performance gains. Notably, the circular underlip configuration achieved the highest improvement, enhancing the efficiency by 9.1% under a takeoff damping variation of 0.0079. This improvement was attributed to its capacity to suppress turbulent kinetic energy generation during wave impact, thereby reducing energy dissipation. The results present a novel, cost-effective design optimization pathway that requires minimal structural modification, contributing to the growing body of research on hydrodynamic enhancement strategies for OWC-based wave energy converters. | ||
| Key Words | ||
| computational fluid dynamic; hydrodynamic; oscillating water column; underlip geometry; wave conversion energy | ||
| Address | ||
| Muhammad A. Bramantya and Heru S.B. Rocharjo: Department of Mechanical and Industrial Engineering, Faculty of Engineering, Gadjah Mada University, Jl. Grafika 2, Yogyakarta 55281, Indonesia Ayodya P. Tenggara and Rahmawan Budiarto: Department of Nuclear Engineering and Engineering Physics, Faculty of Engineering, Gadjah Mada University, Jl. Grafika 2, Yogyakarta 55281, Indonesia | ||
