Dear @GuanJun.Wang,
Information on the WindPACT 1.5-MW baseline wind turbine, from which the OpenFAST model was derived, is available in the following reports:
Regarding the airfoils of the WindPACT 1.5-MW baseline wind turbine, see a similar question asked recently on this forum: Data for NREL Airfoils.
Are you anticipating simulating your redesigned rotor in OpenFAST?
Best regards,