Open and closed compressor impellers
https://www.turbomachinerymag.com/impeller-types/ Open and closed compressor impellersBy William Forsthoffer · On September 15, 2017 Some open impellers can operate at higher tip speeds, and thus produce greater head than closed impellers. Open impellers can produce approximately 4,500 – 7,500 m-kg force/kg mass ( 15,000-25,000 ft-lbs force/lb mass) of head per stage. This is because a side plat..