Aerodynamic optimization design of turbomachinery with approximation model method

To reduce huge computation of the traditional stochastic optimization methods for engineering optimization, approximation model methods with acceptable accuracy for engineering design are developed based on the statistical theory. Especially, the approximation model methods can be applied to the aerodynamic optimization design instead of the time-consuming computational fluid dynamics (CFD) analysis to shorten the design process and reduce the computational cost. In the aerodynamic optimization design of turbomachine, the approximation model methods enable to balance the computational cost and accuracy, whose successful applications in centrifugal compressor impeller, diffuser, and mixed-flow pump impeller designs are introduced to show a wide engineering foreground. An optimization design system has been constructed and practically used for centrifugal compressor components and mixed-flow pump impeller.