Multi-objective design optimization for aerodynamic performance of centrifugal compressor impeller

Abstract Enhancing the performance of the centrifugal compressor system by optimizing the geometric parameters of the impeller is essential for achieving high thermodynamic efficiency and reducing energy costs. This study proposes a multi-objective optimization design approach to improve the pressure ratio and efficiency of centrifugal compressor impellers. The method combines the advantage of numerical simulation with the response surface method so that a reduction of design effort can be achieved. The Krain impeller is used to validate the optimization platform. The benefit of the developed approach is two-fold. On the one hand, the optimized design increased the pressure ratio significantly to the initial design under different working conditions. On the other hand, the impeller approach offers a reference for designers to optimize the design better. The outcomes demonstrate the viability of the approach, and the integrated optimization platform is reliable.