Method and device for modeling flow field of wind turbine tail flow area

The invention discloses a method and a device for modeling a flow field of a wake flow area of a wind turbine, and the method comprises the steps: determining the radius of the wake flow area of the wind turbine according to basic parameters required by flow field modeling and a wake flow linear expansion hypothesis; based on the actual wake flow evolution law, the generation position of the maximum speed loss of the wake flow area is determined; based on the radius of the wind turbine wake flow area, the generation position of the maximum speed loss of the wake flow area and the wake flow influence of the wind turbine blades, the wind turbine wake flow area is subjected to area division; performing regional modeling on the flow field of the wind turbine wake flow region after region division, and establishing a to-be-solved flow field model of the wind turbine wake flow region; and solving the to-be-solved flow field model of the wind turbine wake flow area to obtain a flow field model. According to the flow