Optimization Design of Centrifugal Pump based on MIGA
Pump efficiency and cavitation performance are key indicators related to pump energy characteristic and stability.Based on the Isight multidisciplinary optimization platform,an automatic optimization design platform for centrifugal pumps was constructed by organically combing hydraulic design processes such as parametric modeling,meshing,numerical calculation,optimization analysis and so on.The multi-objective performance of a large flow centrifugal pump with the specific speed of 202m,m3/s is optimized by the multi-island genetic algorithm,which takes the efficiency index and cavitation allowance as objective functions.The results show that the multi-island genetic algorithm can effectively improve the hydraulic performance of the large-flow centrifugal pump.The main performance is that the best efficiency optimization of the centrifugal pump increases by 0.4％,the whole efficiency under the condition of low flowrate is improved within the range of 2％～3％,and the cavitation margin get about 3m reducement under the design conditions.
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