Numerical Simulation Of Hydrodynamic And Sediment Scour For Wind Power Station In Intertidal Zone

The structure of world's energy market has suffered a dramatic change due to the explosion of financial crisis, to overcome its negative influence, almost all the countries focus their eyes on developing new energy resource industry. So, wind power generation, for its advantages of relatively maturity, safe and environment-friendly, is becoming more and more popular. The foundation piles of a wind power station which is built on a sea will inevitably suffer from the drastic interaction of wind, wave, tide and sediment, for this reason, building a reasonable mathematical model to simulate the interaction of the tide, wave and sediment of the project zone is of theoretical and reality meaning.In the first part of this paper, similar researches has been summarized, and then the ADCIRC model for tidal current simulation and SWAN model for wind wave simulation are introduced respectively. On the basis of the introduction of ADCIRC and SWAN, the sediment transportation model and the erosion-deposition model which are based on carrying capacity are imported. After that, field measurement results are used to modify the parameters in the models and the measured values are used to compare with the calculated values, since the coupled hydrodynamic model has considered the interaction of wind, wave and tidal current, it can output accurate wave and current field, and the error is acceptable.Finally, the verified model is applied to simulate the engineering problems. To receive a relatively accurate result, 2-layer nested models and iteration in the big and small models are applied. The transformation of flow field is calculated firstly, after that, the erosion-deposition of engineering zone and the thickness of scour near foundation piles are simulated respectively under the following 3 conditions: normal condition, under the action of strong southeast wind and the action of uttermost east wave. The numerical results show that it is practicable and safe to build a wind power station in this zone, and this mathematical model can reflect the objective fact well, it can be used to guide engineering practice after some refinement.