An experimental investigation on the cascades equipped with conventional smooth blades and non smooth blades was carried out in the low speed plane cascade wind tunnel

so as to study the effects of non smooth blades on the exit streamwise vortex systems.The experimental results show that the non smooth blades exert a distinct influence on the exit streamwise vortex systems.The locations of the passage vortex and trailing vortex shift toward the centre of cascade passage

and the intensity of the trailing vortex weakens.