A centrifugal compressor aerodynamic optimization system based on Pareto multi-objective algorithm was established.The system integrated the parameterized geometric model

ICEM(integrated computer engineering and manufacturing) mesh generation

CFX(computational fluid dynamics X) computation and CFD combined optimization technique.Using this system

the optimization was implemented for a centrifugal compressor volute

and the total pressure loss coefficient and static pressure recovery coefficient were chosen as target variables.Compared with prototype design

the average total pressure loss coefficient of optimal design decreased by 11.79% and the average static pressure recovery coefficient increased by 16.97%.Meanwhile

the secondary flow inside the volute was reduced to a certain degree

and the volute matched better with the impeller.The results show that the multi-objective optimization system is effective to the performance of the centrifugal compressor.