Effects of Flow Coefficient on Miniature Centrifugal Pump Performance

[+] Author and Article Information
Guiqin Liu

School of MAE, Nanyang Technological University

Weng-kong Chan

School of MAE, Nanyang Technological University

1Corresponding author.

ASME 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 macro-size 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 5 times larger than the recommended value using conventional design technique for macro-size pumps. The optimum radius ratio obtained numerically is approximately 0.4. It can be concluded that the design approach for macro-size 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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