School of Energy and Power Engineering;
Lanzhou University of Technology;
Lanzhou 730050;
P.R.China;
Gansu Provincial Technology Centre for Wind Turbines;
Lanzhou 730050;
P.R.China;
Key Laboratory of Fluid Machinery and Systems;
Lanzhou 730050;
P.R.China;
wind turbine airfoil erosion; critical Stokes number; gas-solid two-phase flow;