This is my "Dyson" style fan. I used a small fan from a decommissioned server in the base which is super loud and powerful. the fan works very well and is pretty easy to print. the inner part shouldn't need supports and the outer portion requires supports only for the base. I included images on how to position them in the slicer. I would have modified the STL files so they were already in the correct position but i apparently deleted the Sketchup files. . .
I did not include the base since I plan on completely redoing this design to include an impeller blade which will need a new base.