Optimization of a double sided centrifugal pump
CHALLENGE - Centrifugal pumps are widely used in industrial applications. Compared to single-entry centrifugal pumps, double-sided pumps allow transportation of greater flow rates due to smaller proneness to cavitation, and offer counter-balancing of axial hydraulic forces due to double-entry design. The optimization techniques bring many benefits over the traditional "trial-and-error" design process: shorter design phase, exploration of design space in a more systematic way, development with less hard-to-spot human-based errors, etc. In turbomachines, usually multiple objectives have to be optimized.
SOLUTION - The optimization study of a double-sided centrifugal pump with specific speed nq=62 (per impeller side) was performed within modeFRONTIER optimization platform. During the optimization only the impeller geometry was allowed to be modified, while the rest of the geometry was fixed. The objective of the study was twofold: to compare different Response Surface Methods (RSMs) for their ability to predict pump efficiency; to propose and validate an economical decoupled simulation method for the optimization of a pump.
BENEFITS - The presented method with estimation of flow losses in the volute represents a good approach for quick optimization.