抄録
There is tubercle structure at leading edge of humpback whale fin. The research of this structure is studied flourishingly . Now, in this research, I made the wind mill blade which has tubercle structure and the one which has no tubercle structure .and calculated that the difference of tubercle fin and no tubercle fin by ANSYS-CFX. I calculated the rise time of small wind mill blade at air force -kinematic coupled analysis . There is no large difference between the rise time of tubercle fin and the one of no tubercle fin. However, I confirmed the obvious differences in the pressure on blade and vortex near blade ,which are caused by tubercle structure
