风切变对风力机尾迹特性影响的数值研究

hrough the steady-state numerical simulation of the wake characteristics of a two-blade horizontal axis wind turbine under uniform incoming flow and wind shear incoming flow, the axial velocity loss and turbulence intensity change in the wake area are studied. The results show that under the two incoming flow conditions, the radial distribution of the axial velocity at different positions in the wake area has gradually changed from an "M"-shaped distribution to a "V"-shaped distribution. However, the upper and lower axial velocities of the vertical plane under the wind shear are not symmetrical; on the horizontal plane, due to the unevenness of the incoming flow and the rotation effect of the wind wheel under the condition of the wind shear, the left and right sides behind the wind wheel The axial velocity appears asymmetry; when the turbulence intensity of the incoming flow is constant, different incoming flow conditions have little effect on the turbulence intensity behind the wind wheel.