Hand Held 12v Vacuum W/ Different Fan designs

Hand Held 12v Vacuum W/ Different Fan designs

grabcad

Hello all,In here I have a small vacuum design.It took a while getting to understand and improve on the centrifugal fan. and I have decided to include all my attempts.After testing with SW Flow simulation, and testing after 3D printing, the winner was CentFan4.Any feedback is always appreciated.Thank you.

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