White Papers

A Complex Approach Using Splitter Blade Impellers To Improve Centrifugal Pump Performance

CFturboThis work presents the results of complex research of changes in the hydraulic, stress-strain state and dynamic characteristics of the double-entry single stage pump (specific speed nq=55) in the case of introduction of splitter blades in the basic design are presented in this paper.

Since the splitter blades modify flow within the blade-to-blade channel, the energy loss will depend on their shape. Determination of the maximum possible increasing of impeller head while maintaining or increasing the efficiency is connected with multiparametric optimization of the splitter blades geometry. Geometrical dimensions determining the shape and position of the splitter blades were used as variable parameters. Head and efficiency are the objective functions. Determination of hydrodynamic flow parameters was carried out by using the CFD meth- ods. In this paper some thoughts regarding the influence of the shape and location of the splitter blade on the distribution of flow parameters are discussed. Comparative analysis of strength and vibration characteristics of the pump with the original impeller and splitter blade impellers carried out on the basis of FEM-analysis. The results of the this study highlighted aspects allow us to conclude that to ensure reliable operation of the pump approach to splitter blade impeller design should be more consistent and comprehensive.

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