Operating in the harsh marine environment, fluctuating loads due to the surrounding turbulence are important for fatigue analysis of marine current turbines (MCTs). The large eddy simulation (LES) method was implemented to analyze the two-way fluid–solid interaction (FSI) for an MCT. The objective was to afford insights into the hydrodynamics near the rotor and in the wake, the deformation of rotor blades, and the interaction between the solid and fluid field. The numerical fluid simulation results showed good agreement with the experimental data and the influence of the support on the power coefficient and blade vibration. The impact of the blade displacement on the MCT performance was quantitatively analyzed. Besides the root, the highest stress was located near the middle of the blade. The findings can inform the design of MCTs for enhancing robustness and survivability.
Based on the analysis method of CFD-Fluent, and designed the different sinks with five widths and three depths, the variation influence on the performance of the runner of energy conversion was explored by the changing size of the sink, and the brief analysis was given based on the theory of finite wing span and infinite wing span, and the results of numerical simulation were compared with the model test results. This research can be used to the reference for the model test and the conversion of prototype-model of horizontal tidal Current turbine.
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