CFD wind turbines wake effects by using UDF

Abstract

The numerical simulation of wind turbine generators was carried out to investigate the relationship between wake expansion and distance of two wind turbine generators in a row. The commercial software ANSYS Fluent was used to perform the Computational Fluid Dynamics (CFD), and further, the standard k- turbulence modeling has been adopted to solve the steady-state, 3D Reynolds Averaged Navier-Stokes (RANS) equations. Results of near and far wake regions are analyzed. In fact, due to the squeezing effect of the wind turbine generators on the surrounding air, it is found that there is an acceleration area nearby the wind turbine rotors. The arrangement distance of wind turbine generators in a row is analyzed. The results show that as the arrangement distance of the wind turbine generators increases, the average wind speed and the wind power density in the acceleration area decrease. This conclusion has guiding significance for the arrangement of wind turbines in wind farms.