Looks awfully close to this
Yeah I read popsci, don’t judge me.
I’d say decrease the lines in your texture that indicated that metal has been bolted or welded together The more inconsistencies in metal such as small bulges or gaps made by bolting,or being welded then sanded would make the turbine less aerodynamic, which is why the turbine in the image above has less of those lines in the turbine.
Also the head of your turbine, the part the looks like the end of a missle looks welded to the stationary portion of the turbine or barely scraping it,so I don’t believe it would make a pleasent sound the moment it turns. Not much else to crit about.