School of Aeronautics;
Northwestern Polytechnical University;
Xi'an 710000;
China;
Computational Aerodynamics Institute;
China Aerodynamics Research and Development Center;
Mianyang 621000;
China;
Low Speed Aerodynamics Institute;
China Aerodynamics Research and Development Center;
Mianyang 621000;
China;
Airfoil design; CRA09 airfoil; Optimization method; Rotor; Wind tunnel test;