Bionic hypocycloid wave front edge blade and design method

The invention discloses a bionic hypocycloid wave front edge blade and a design method, and belongs to the technical field of turbomachinery noise control. The blade is formed by stacking blade molded lines with periodic chord lengths in the spanwise direction, the formed blade front edge structure is a hypocycloid wave, and the average front edge line of the hypocycloid wave front edge blade is consistent with the front edge line of the reference blade. The design method comprises the following steps: determining a reference point O of a reference blade, a chord length c of a reference blade profile, a maximum thickness d and a corresponding coordinate position P; determining a value a in the hypocycloid standard equation; determining a convex hypocycloid wave front edge structure or a concave hypocycloid wave front edge structure; and the obtained blade profiles with different chord lengths are stacked in the spanwise direction to obtain a hypocycloid wavy front edge structure of one period, and then the wh