| For inadequate research of the wind turbine under the sand environment,in this paper,the gas-solid two-phase flow characteristics of wind turbine airfoil in the sand wind environment are researched by the discrete phase model of the CFD. The blade element theory is used to study the influence of the rotor torque characteristics in the sand wind environment.The main contents include,The discrete phase model, the RANS equations and k-ε turbulence model are used to study the effect on lift coefficient and drag coefficient with the change of mass concentration. With the same median diameter, mass concentration has little influence on lift and drag coefficient. With the increase of mass concentration, the lift coefficient of wind turbine airfoil NACA-0012increases rapidly, then stable, the lift coefficient continues to increase by the mass concentration larger than1.02kg/m3. The drag coefficient of wind turbine airfoil NACA-0012decreases first, then stable, when the mass concentration larger than1.02kg/m3,the drag coefficient continue increase.With the increase of mass concentration, the lift coefficient of the airfoil has slight increase, and the drag coefficient decreases slightly.Studying the effect on lift and drag coefficient with the change of median diameter. When the mass concentration is same, the lift coefficient of wind turbine airfoil NACA-0012decreases rapidly first and then increases with the increase of median diameter,and is stable finally,and the drag coefficient of wind turbine airfoil NACA-0012increases rapidly first, then decreases, and then increases a little, and is stable finally. The lift coefficient of airfoil decreases first and then increases with the increase of median diameter, and is stable finally, the drag coefficient increases first, then decreases, and then increases, and is stable finally.The blade element theory is used to study the influence of the wind wheel torque characteristics with the change of mass concentration and median diameter in the sand wind environment.When the median diameter is same, the wind wheel torque characteristics decreases first, then increases,and then decreases,and is increases finally with the increase of mass concentration. With the same mass concentration, the wind wheel torque characteristics decreases first and then increases rapidly. |
