Decoupled CFD-based optimization of efficiency and cavitation performance of a double-suction pump

HYPERBOLE Symposium 2017 (HYdropower plants PERformance and flexiBle Operation towards Lean integration of new renewable Energies)

Škerlavaj, A.^1,2 ; Morgut, M.^2 ; Jot, D.^1 ; Nobile, E.^2

Kolektor Turbointitut, Rovnikova 7, Ljubljana

1210, Slovenia^1

University of Trieste, Department of Engineering and Architecture, Piazzale Europa 1, Trieste

34127, Italy^2

关键词: Cavitation performance;    CFD based optimizations;    Double suction pumps;    Hydraulic efficiency;    Impeller geometry;    Impeller outlet;    Optimization parameter;    Optimization strategy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/813/1/012048/pdf
DOI  :  10.1088/1742-6596/813/1/012048

来源: IOP

【 摘 要 】

In this study the impeller geometry of a double-suction pump ensuring the best performances in terms of hydraulic efficiency and reluctance of cavitation is determined using an optimization strategy, which was driven by means of the modeFRONTIER optimization platform. The different impeller shapes (designs) are modified according to the optimization parameters and tested with a computational fluid dynamics (CFD) software, namely ANSYS CFX. The simulations are performed using a decoupled approach, where only the impeller domain region is numerically investigated for computational convenience. The flow losses in the volute are estimated on the base of the velocity distribution at the impeller outlet. The best designs are then validated considering the computationally more expensive full geometry CFD model. The overall results show that the proposed approach is suitable for quick impeller shape optimization.