Abstract
The top-mounted pitching point absorber is one of the most promising wave energy converters in that it can be easily attached to an existing offshore structure. However, it is difficult to predict accurately its energy conversion performance because of the strongly nonlinear hydrodynamic behaviour. Herein, smoothed particle hydrodynamics (SPH) is used to solve this wave-structure interaction problem. The SPH method is first validated against free surface deformation measurements obtained from a wedge water entry experiment. SPH simulations of regular wave interaction with fixed and freely pitching devices agree well with measured data, providing confidence in the prediction of power conversion performance. Absorbed power and capture width ratio exhibit uni-modal behaviour with wave period. The wave period of peak power within this distribution increases with PTO damping. According to the observed scaling behaviour with device scale, an optimally damped larger scale device is effective at absorbing energy from incident waves of longer wavelength. In finite deep water, the larger device achieves higher efficiency compared with the smaller ones, and its peak efficiency at 2πh/λ=1.1 provides reference for siting.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 114893 |
| Tidsskrift | Energy Conversion and Management |
| Vol/bind | 250 |
| ISSN | 0196-8904 |
| DOI | |
| Status | Udgivet - 15 dec. 2021 |
Bibliografisk note
Funding Information:This work was supported by the National Key Research and Development Plan of China (Nos. 2019YFB1504402, 2017YFE0132000 and 2018YFB1501202), the National Natural Science Foundation of China (No. 11872248) and the Self-directed Research Subject of the State Key Laboratory of Marine Engineering, Shanghai Jiao Tong University (No. GKZD010075). The authors would like to thank Hongliang Wang and Jianguo Gong for their assistance in the experiments.
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