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Ocean Systems Engineering
  Volume 8, Number 4, December 2018 , pages 361-380

A study on performance assessment of WEC rotor in the Jeju western waters
Sunny Kumar Poguluri and Yoon Hyeok Bae

    The dynamic performance of the wave energy converter (WEC) rotor with different geometric parameters such as depth of submergence and beak angle has been assessed by considering the linear potential flow theory using WAMIT solver and along with the computational fluid dynamics (CFD). The effect of viscous damping is incorporated by conducting numerical free decay test using CFD. The hydrodynamic coefficients obtained from the WAMIT, viscous damping from the CFD and estimated PTO damping are used to solve the equation of motion to obtain the final pitch response, mean optimal power and capture width. The viscous damping is almost 0.9 to 4.6 times when compared to the actual damping. It is observed that by neglecting the viscous damping the pitch response and power are overestimated when compared to the without viscous damping. The performance of the pitch WEC rotor in the Jeju western coast at the Chagwido is analyzed using Joint North Sea Wave Project (JONSWAP) spectrum and square-root of average extracted power is obtained. The performance of WEC rotor with depth of submergence 2.8 m and beak angle 60 found to be good compared to the other rotors.
Key Words
    wave energy converter (WEC) rotor; viscous damping; CFD simulation; square-root of average extracted power
Sunny Kumar Poguluri and Yoon Hyeok Bae: Department of Ocean System Engineering, Jeju National University,
102 Jejudaehak-ro, Jeju-si, Jeju Special Self-Governing Province, 63243, Republic of Korea

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