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Research Papers: Flows in Complex Systems

Effects of Flow Coefficient on Miniature Centrifugal Pump Performance

[+] Author and Article Information
Guiqin Liu

School of MAE,
Nanyang Technological University,
50 Nanyang Avenue,
Singapore 639798
e-mail: liug0007@e.ntu.edu.sg

Weng Kong Chan

School of MAE,
Nanyang Technological University,
Singapore 639798
e-mail: mwkchan@ntu.edu.sg

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received May 8, 2017; final manuscript received August 10, 2018; published online October 4, 2018. Assoc. Editor: Matevz Dular.

J. Fluids Eng 141(3), 031103 (Oct 04, 2018) (8 pages) Paper No: FE-17-1267; doi: 10.1115/1.4041228 History: Received May 08, 2017; Revised August 10, 2018

In order to help the design of miniature centrifugal pumps, the design method for macrosize centrifugal pumps is reviewed and the critical parameter, the flow coefficient, is examined in this paper for the miniature centrifugal pumps. The performance of the pumps designed is analyzed theoretically, numerically, and experimentally. Both numerical and theoretical results show that the value of the optimized flow coefficient is approximately 1.47. This value is about five times larger than the recommended value using conventional design technique for macrosize pumps. The optimum radius ratio obtained numerically is approximately 0.4. It can be concluded that the design approach for macrosize pumps is not applicable for pumps in the scale of decimeters. The results obtained in the present study provide us guidelines on the design and performance study of the miniature centrifugal pump.

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References

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Figures

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Fig. 2

Experimental models of 20 mm diameter impellers

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Fig. 1

Volume meshes built in GAMBIT

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Fig. 3

Schematic view of the test rig

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Fig. 11

Effect of the blade radius ratio of 20 mm diameter models at 112.5 rad/s

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Fig. 12

Effect of the blade radius ratio of 10 mm diameter models at 450 rad/s

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Fig. 10

Pump performance curves of impeller model 5 at 112.5 rad/s

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Fig. 4

Pump performance curves of the 20 mm diameter radial model at 112.5 rad/s

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Fig. 5

Pump performance curves of the 10 mm diameter radial model at 450 rad/s

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Fig. 6

(a) Numerical relative velocity distribution of the 20 mm diameter radial model at 112.5 rad/s with flow rate of 2 l/min and (b) experimental relative velocity distribution of the 20 mm diameter radial model at 112.5 rad/s with flow rate of 2 l/min

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Fig. 7

Effect of the flow coefficient of 20 mm diameter models

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Fig. 8

Effect of the flow coefficient of 10 mm diameter models

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Fig. 9

Pump performance curves of original impeller model 10 at 112.5 rad/s

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