| With the continuous development of wind power industry, construction siting of wind farm has gradually evolved from simple topography to complex terrain, and construction siting of wind farm is directly related to the benefits of wind farm. Wind resource assessment can provide valuable data support for the siting of wind farm. So, accurately evaluating the distribution of wind energy in the flow field and turbulence intensity characteristics, is the key to guarantee the safe operation of the wind farm and benefit of the return.Because of its high accuracy can be achieved and save money, wind resource assessments by CFD calculation are widely used in construction projects.This paper uses the solver buoyantBoussinesqSimpleFoam of the open CFD software-OpenFOAM to simulate the wind farm. First, we use the flat terrain and homogeneous atmospheric boundary layer (ABL) flow, three groups of numerical simulation models were established corresponding to the neutral state, stable state and unstable state of atmospheric boundary layer to prove the validity of the models. Because of its accuracy, the model of neutral state is chosen as the calculation model in the following text. Then, in order to check the rationality of buoyantBoussinesqSimpleFoam solver and the numerical models, Askervein Hill is numerically simulated and the results are compared with the experiment data. The micro sites of wind turbines are briefly analyzed on the basis of CFD calculation results and we come to the following conclusion:it is adequate to set up wind turbines on the upwind side of Askervein Hill from the half height to the top of the mountain, and also the half height of the mountain of the leeward side.Lately, the paper conducts the numerical simulation of Bolund island under the west wind (270°) and east wind (90°), the results of the distribution of wind energy and turbulence intensity are compared with the experiment data in order to check the rationality of the simulation models. |
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