Parametric Fan Adapter with anti-turbulence vents

I was trying to make a fan duct with low turbulence because aparently pc fans are horrible in pushing air

Here is a nice instructive video about it https://www.youtube.com/watch?v=SX-okOHvh1Q&list=RDCMUCSi3noC0JkukKm1rl-tt9YA&start_radio=1&rv=SX-okOHvh1Q&t=1522

I used OpenSCAD files mostly but combined them and manipulated them through FreeCAD.

I first took the parametric fan conversion adapter https://www.thingiverse.com/thing:21112

And then added a propeller from this scad file. https://www.thingiverse.com/thing:1765338

you can experiment more with the openSCAD files

Of course credit goes to the original creators, it works quite well

It uses both models to create an anti-turbulant fan duct