Centrifugal Compressor and Diffuser

This is a model of a centrifugal compressor I made for a model turbojet I have been working on. I have no experience with the science behind compressors so I don't know how effective or efficient this design is. I basically used a bunch of pictures I found online and tried to recreate what I thought would look good.

I also uploaded the SolidWorks model for the compressor if someone wants to change the hole that I had on the compressor.