Effects of Impeller Blade Number on Performance of Centrifugal Pumps




The blade number of impeller is an important design parameter of pumps, which affects the characteristics of pump heavily. Computational fluid dynamics simulation and experimental verification are used to investigate the effects of blade number on flow field and characteristics of a centrifugal pump [1],[2].

Input Data

The impeller geometry can be formed by using the data below. Non critical parameters can be assumed for this project.

Fig.1 3D model of the pump.

Table.1 Design parameters of the centrifugal pump.


The purpose of this project is to validate the accuracy of the solver for rotating geometries. The velocity, and pressure head distribution results are to be compared with the proposed results at different blade numbers.

Fig.2 Static pressure distribution at different number of blades.

Fig.3 Relative velocity distributions at front shroud for different impellers (m/s).

Key Words

centrifugal pump, blade number, flow field simulation, characteristics prediction

Literature & Sources

[1] http://www.cjmenet.com/CN/article/downloadArticleFile.do?attachType=PDF&id=1939
[2] Shouqi, LIU Houlin WANG Yong YUAN, and TAN Minggao WANG Kai. “Effects of blade number on characteristics of centrifugal pumps.” Chinese journal of mechanical engineering 23.6 (2010): 1.


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