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Hydraulics and Blading of Centrifugal Pump Impellers: A Systematic Review and Application

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Iranian Journal of Science and Technology, Transactions of Mechanical Engineering Aims and scope Submit manuscript

Abstract

To develop a solid hydraulic designing model, a systematic survey of the existing hydraulic designing models and the blading layout techniques for centrifugal pump impellers is performed. Firstly, a hydraulic designing technique based on blade loading model is put forth using the Euler pump and turbine equation and the Bernoulli equation under the rotating reference frame. Secondly, a brief introduction on the conformal mapping method is presented. Thirdly, a blading layout technique is performed by the transformation between polar and rectangular plane coordinates. At last, the hydraulic designing model and the blading layout techniques are integrated into a CAD based designing system. The system is proved flexible and robust during the practical designing process.

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Abbreviations

b 1 :

Blade inlet width (mm)

b 2 :

Blade outlet width (mm)

D 1 :

Impeller suction eye diameter (mm)

D 2 :

Impeller wheel diameter (mm)

g :

Gravitational acceleration (m s−2)

h 01 :

Stagnant enthalpy at position r1 (J)

H :

Pump head (m)

n :

Impeller rotating speed (r min−1)

Q :

Pump flow rate (m3 s−1); heat gained from outer circumstance (J)

u 1 :

The impeller rotating speed at radius r1 (m s−1)

v u1 :

Entering flow tangent velocity at radius r1 (m s−1)

W p :

Relative velocity on the pressure side (m s−1)

W s :

Relative velocity on the suction side (m s−1)

β 1 :

Blade inlet angle (°)

β 2 :

Blade outlet angle (°)

ω :

Angular velocity of impeller (rad s−1)

ρ :

Fluid density (Kg m−3)

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Acknowledgements

The authors are grateful for the support by the National Natural Science Foundation of China (No. 51309118), the Natural Science Foundation of Jiangsu Province (No. BK20130527) and the Six Talent Peaks Project of Jiangsu Province (No. 2015-ZBZZ-016).

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Authors and Affiliations

  1. National Research Center of Pumps, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, People’s Republic of China

    Qihua Zhang, Li Cao, Zhaoxu Yan & Weidong Zhang

  2. Department of Mechanical Engineering, Eindhoven University of Technology, 5612 AZ, Eindhoven, The Netherlands

    Qihua Zhang

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  1. Qihua Zhang
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Correspondence to Qihua Zhang.

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Zhang, Q., Cao, L., Yan, Z. et al. Hydraulics and Blading of Centrifugal Pump Impellers: A Systematic Review and Application. Iran J Sci Technol Trans Mech Eng 43 (Suppl 1), 1–12 (2019). https://doi.org/10.1007/s40997-018-0203-8

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