With the optimization platform of three-dimensional(3-D) design

the optimization design was carried out for rotor 2 of a two stage counter-rotating compressor in multistage environment based on the methods such as: three-dimensional Navier-Stokes(N-S) flow computation

blade section parameterization

artificial neural networks and genetic algorithm.The optimization objective is to maximize the isentropic efficiency while the mass flow and total pressure ratio are controlled.Numerical results show that efficiency is increased by 1.5% at design point after optimization of rotor 2.The gain in aerodynamic performance is largely attributable to the reduction of losses due to flow separation in suction side

as observed through flow field analysis.