Orange Juicer CPU Fan

thingiverse

This a freehand attempt at fan design. The airfoils are warped because of the low aspect ratio blades and high sweep. There is version of the fan attached experimenting with a new fan design tool called the lifretor, which is intended to work as a lift redistributor, and move air from the outer sections, to the center of the fan, or simply reduce tip losses. Because of the low Re number, I am experimenting with weird things because airfoils have very low performance below 50k RE.