Performance Improvement of a Gyro-Mill Wind Turbine by Adding Vertical Flow

(Numerical Analysis by a 2D model)

Abstract

The proposed analytical model for the vertical flows in a gyro-mill wind turbines is studied. The two-dimensional flow structure of the rotating blades is clarified by the numerical calculations using the finite-difference lattice Boltzmann method. The results of the numerical calculation qualitatively agree with those obtained by experiments. The suction flow increases the torque of the rotor blade in upstream, and it suppress a reduction in the torque of the rotor blade in downstream. The results for the sink flow brings reverse action as those obtained by the suction flow.