OpenFOAM을 이용한 편심 원형실린더 파력발전장치의 비선형 운동해석

다국어 초록 (Multilingual Abstract)

In this study, the numerical simulation with OpenFOAM, an open source library in Computational Fluid Dynamics(CFD), is conducted for analyzing a non-linear dynamic behavior of an eccentrical cylinder-type Wave Energy Converter(WEC) in wave field. Two optimal eccentrical cylinder-type WECs constrained in single degree of freedom(pitch) are analyzed with interDyMFoam which solves the Reynolds-Averaged Navier-Stokes(RANS) and deals with dynamic mesh. In addition, Arbitrary Mesh Interface(AMI) is employed to prevent the mesh from being distorted. Numerical results of free decay tests and dynamic behaviors with different wave heights and periods are compared with model-scale experimental results. A larger scale study is also performed. Pitch Response Amplitude Operator(RAO)s with a lower and a higher wave height are compared and non-linear dynamic behaviors are obviously investigated by spectrum analysis. The results show that higher order pitch harmonic motions are grown or added according as wave height is increased. Therefore, RAO with a higher wave height is smaller than a lower wave height due to the non-linear effect.

참고문헌 (Reference)

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