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Effects of the shape and size of a mooring line surface buoy on the mooring load of wave energy converters

Journal of Chongqing University 2012年第1期11卷 1-4页

作者： KRIVTSOV Vladimir LINFOOT Brian HARRIS Robert E. School of Built Environment Heriot-Watt UniversityEdinburgh EH14 4ASUnited Kingdom

This paper describes the physical model testing of a wave energy converter (WEC) undertaken in the Heriot-Watt wave basin during October 2010 as part of the SUPERGEN2 project funded by the British government,and provides a preliminary analysis of the extreme mooring *** were completed at 1/20 scale on a single oscillating water column device deployed with a 3-line taut mooring *** model was fully instrumented with mooring line load cells and an optical motion *** tests were preceded by calibration of instrumentation and the wave test environment,and carried out in long crested waves regimes with 12 combinations of peak period T p and significant wave height H *** main objective for these experiments was to examine the effect of shape and size of the tethered buoy on the leading mooring line on the maximum mooring loads and the excursion of the *** of the loads at different configurations of the tethered buoy suggests that the results are consistent with the hypothesis that the mooring forces should depend on the change in stiffness of the mooring *** particular,the results indicate that with the spectral peak period close to the natural period of the moored device of 8 s,peak loads in a configuration with a smaller buoy may be considerably higher than those with a larger ***,when T p was dissimilar,a harder mooring with a smaller spherical buoy appears to result in lower peak *** exact configuration should,therefore,be chosen according to the prevalent conditions of any particular location,and will also depend on the design and expected maintenance schedule,as well as matters related to the risk to navigation,environmental effects and the conservation status of the area.

关键词： mooring load wave energy converter spherical buoy

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Numerical Simulation of Hydrodynamic Forces Acting on Curved Shape Trash Intercepting Net in Nuclear Power Plant Under Regular Waves

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China Ocean Engineering 2024年第6期38卷 983-998页

作者： WANG Bin WANG Xin-long GAO Shan QIAO Dong-sheng LI Yu DENG Ziran OU Jin-ping Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province Hangzhou 311122China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Powerchina Huadong Engineering Corporation Limited Hangzhou 311122China

The occurrence of blockages of trash intercepting net in nuclear power plant due to marine biofouling has become increasingly frequent,leading to significant changes in the mechanical *** paper establishes a CFD(Computational Fluid Dynamics)model to simulate the hydrodynamic forces of trash intercepting net under the action of regular *** porous media model is used to calculate the hydrodynamic forces,and the maximum mooring load is also *** simplified calculation method considering the different curved shape based on the flat nets are proposed,and the influences of wave parameters,solidity,and curved shape are *** results indicate that under the regular wave conditions,as the solidity increases,the phenomenon of secondary wave peaks becomes more *** horizontal wave force reduction coefficient follows a three-piecewise linear relationship with the non-dimensional deformation level of curved *** trash intercepting net exhibits more potent scattering effects on short-wave conditions,displaying significant non-linear *** deformation level of the trash intercepting net is a significant factor influencing the mooring load.

关键词： trash intercepting net curved shape CFD model drag forces mooring load nuclear power plant

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