An optimization method for the hydraulic design of centrifugal pumps at multioperation points was proposed by means of a global optimization algorithm and a computational model for estimating hydraulic losses and energy performance of centrifugal pumps.In the method,the values of several key geometric parameters in an original design were used as the initial conditions,and the design head was considered as a constraint condition,and the weighted average shaftpower at multiple operation conditions was chosen as the objective function.The adaptive simulated annealing algorithm was used to solve the model of hydraulic losses and energy performance.Additionally,the supertransitive approximation method was applied to update optimal weighted coefficients in the objective function.A centrifugal pump with a special speed of 129.3 was optimized with the method.The CFD numerical simulations were done for the original design and the optimized one,respectively.It was shown that the shaftpower of the optimized case is less,but the head is higher than the original design at 0.6Qd and 1.2Qd.The weighted average shaftpower optimized is decreased by 0.06%,but the weighted average efficiency rises by 0.46% compared with the original design.The results could be really useful to design an energysaving centrifugal pump.
WANG Kai,LIU Hou-Lin,YUAN Shou-Qi et al. Optimization method for hydraulic performance of centrifugal pump at multi operation points[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(1): 20-24.
Ge Zailin,Lü Bin,Yu Xin.Optimal design of centrifugal pump impeller[J].Journal of Dalian Railway Institute,2006,27(3):37-40.(in Chinese)[LL]
［4］Grapsas V,Stamatelos F,Anagnostopoulos J,et al.Numerical study and optimal blade design of a centrifugal pump by evolutionary algorithms［C］∥Proceedings of the 12th International Conference on KnowledgeBased Intelligent Information and Engineering Systems.Zagreb,Croatia:Springer-Verlag,2008:26-33.
Guo Tao,Li Guojun,Tian Hui,et al.Parametric modeling and optimization design of centrifugal pump impeller based on genetic algorithm[J].Journal of Drainage and Irrigation Machinery Engineering,2010,28(5):384-388.(in Chinese)
［7］Karassik Igor J,Messina Joseph P,Cooper Paul,et al.Pump Handbook［M］.4th ed.New York:McGrawHill Professional,2008.