Numerical Simulation Of The Influence Of The Wind Turbine On The Atmosphere Boundary Layer

Located at the bottom of the atmosphere, atmosphere boundary layer is close to the ground and the friction has greatest impact on it. The characteristic of it is the distribution feature of the wind speed and the turbulence, so wind farm must has some impact on wind speed and turbulence because wind power is using the wind to generate electricity. But the current rapid development of wind energy is under the lack of the overall evaluation to the environment, so it could bring some consequences without scientific evidence, so it is critical to further study of the influence of the wind power to the atmosphere boundary layer, and can provide some strategy and guidance to the future energy development.This paper study the influence of the wind turbine to the atmospheric boundary layer using Fluent software, due to involve the atmosphere boundary layer,so on the basic of wind turbine wake, it also analyze the influence in vertical direction. By establishing the model of wind turbine and wind farm, loading the function of speed distribution, setting the surface roughness to approximately form the real velocity distribution in the boundary layer, make the results more close to actual.First analysis the effect of the single wind turbine to atmosphere boundary layer, it is showed that the velocity after the hub has been lift slowly, but the rate gradually decreased, and until the export field, it still lower than the entrance velocity. Turbulent kinetic energy along the height firstly decreases and then increase because of the wind turbine agitation. Then study several turbine to the boundary layer, by simulating two placements of wind turbines in wind farms, it showed that both the aligned and staggered arrangements, in different distance above the turbine, velocity and turbulent kinetic energy present a different change rule, but it is more confusion in the staggered arrangement. In short, the operation of the wind turbine disturbed the atmosphere boundary layer, the speed and turbulent kinetic energy all dramatic changed.