Numerical analysis of the wind turbine′s far wake

A new far wake model is established in this paper,and a CFD method which combining the actuator disc methodology is also employed to investigate numerically the behavior of wake behind a single wind turbine.The new wake model is builded using classical Park model and made some trigonometric correction.The CFD simulations which using the commercial software Fluent code are based on Fan boundary condition.The velocity deficit on the wake centerline is presented here and crosswind profiles of mean velocity at hub height for three tip ratios are also shown.Comparation among the simulation results,the wind tunnel results and the predictions obtained from Park model for a single wind turbine,proved that results of this paper revealing the turbine wake phenomenon somewhat.The successful computation of the problems shows that the new wake model with more accuracy and less computing cost can be used as an effective tool in engineering.The CFD method also reflect the flow field information accurately.Both the two methods can be used as an evaluation method for the micro-sitting and the optimization in placement of wind turbines within wind farm.