Fan blade surface features

A fan blade comprising:

• a working region having a leading edge, a trailing edge, a pressure side, a suction side and a tip;
• and
• a plurality of flow modification features positioned at the working region, the plurality of flow modification features including:
• a first flow modification feature having a wedge shape with a pointed end and a wider end, and located on the pressure side, wherein a length of the first flow modification feature is less than a chord length of the fan blade, and wherein the pointed end of the first flow modification feature is spaced from the leading edge;
• and
• a second flow modification feature having a wedge shape with a pointed end and a wider end, and located on the pressure side, wherein a length of the second flow modification feature is less than the chord length of the fan blade, wherein the pointed end of the second flow modification feature is spaced from the leading edge, wherein the first and second flow modification features are spaced from each other to define a channel therebetween, and wherein the wider ends of the first and second flow modification features are both aligned with the tip.