Objective the dynamic stall problem of corroded airfoil in wind-sand environment.Methods The dynam-ic stall of S802 airfoil was simulated Euler two-fluid method.The effects of different oscillation frequencies,sand diameter and sand volume fraction on the dynamic stall of corroded airfoil were studied under the condition of wind speed of 10m/s,and the variation law of aerodynamic force of S802 airfoil under different working conditions was obtained.Results In the process of dynamic stall,the lift of the airfoil increase with the increase of sand vol-ume fraction.he sand size ha little effect on the stall of the airfoil.In addition,with the increase of the oscillation frequency,the unsteady effect of the flow field around the airfoil becmemore significant,and the lift variation range of the airfoil increase.The pressure distribution on the airfoil surface change rapidly with the oscillation fre-quency.Conclusion The research results have important guiding significance for the maintenance of wind turbine blades in harsh environments.
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