0
Research Papers: Flows in Complex Systems

Reynolds Number Effects on the Performance Characteristic of a Small Regenerative Pump

[+] Author and Article Information
Shin-Hyoung Kang

 Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Koreakangsh@snu.kr

Su-Hyun Ryu

 Korea Institute of Nuclear Safety, 34 Gwahak-ro, Yuseong-gu, Daejeon 305-338, Koreak653rsh@kins.re.kr

J. Fluids Eng 131(6), 061104 (May 15, 2009) (10 pages) doi:10.1115/1.3026629 History: Received March 05, 2007; Revised September 30, 2008; Published May 15, 2009

This paper studies the effect of the Reynolds number on the performance characteristics of a small regenerative pump. Since regenerative pumps have low specific speeds, they are usually applicable to small devices such as micropumps. As the operating Reynolds number decreases, nondimensional similarity parameters such as flow and head coefficients and efficiency become dependent on the Reynolds number. In this study, the Reynolds number based on the impeller diameter and rotating speed varied between 5.52×103 and 1.33×106. Complex three-dimensional flow structures of internal flow vary with the Reynolds numbers. The coefficients of the loss models are obtained by using the calculated through flows in the impeller. The estimated performances obtained by using one-dimensional modeling agreed reasonably well with the numerically calculated performances. The maximum values of flow and head coefficients depended on the Reynolds number when it is smaller than 2.65×105. The critical value of the Reynolds number for loss coefficient and maximum efficiency variations with Reynolds number was 1.0×105.

Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 4

Comparison between measured and calculated head versus flow coefficients

Grahic Jump Location
Figure 5

Flow distributions at the suction side of the blade (Re=6.63×105): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 6

Flow distributions at the periodic boundary of the blades (Re=6.63×105): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 7

Flow distributions at the pressure side of the blade (Re=6.63×105): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 8

Flow distributions at the plane of mean radius (Re=6.63×105): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 3

Domain for numerical calculations

Grahic Jump Location
Figure 2

Section view of a regenerative pump

Grahic Jump Location
Figure 1

Regenerative pump assembly

Grahic Jump Location
Figure 14

Variations in maximum flow and shut-off head coefficient with Reynolds number

Grahic Jump Location
Figure 15

Variations in circulatory flow coefficient with Reynolds number

Grahic Jump Location
Figure 16

Variations in theoretical head rise with Reynolds number

Grahic Jump Location
Figure 17

Variations in head loss coefficient with flow coefficient

Grahic Jump Location
Figure 18

Variations in loss coefficient with Reynolds number

Grahic Jump Location
Figure 19

Variation in hydraulic efficiency curves

Grahic Jump Location
Figure 20

Variations in maximum hydraulic efficiency and flow coefficient with Reynolds number

Grahic Jump Location
Figure 9

Flow distributions at the suction side of the blade (Re=6.63×103): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 10

Flow distributions at the periodic boundary of the blades (Re=6.63×103): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 11

Flow distributions at the pressure side of the blade (Re=6.63×103): (a) streamlines, (b) tangential velocity, and (c) static pressure distributions

Grahic Jump Location
Figure 12

Flow distributions at the plane of mean radius (Re=6.63×103): (a) streamlines, (b) tangential velocity, and (c ) static pressure distributions

Grahic Jump Location
Figure 13

Variations in pressure coefficients with flow coefficients for various Reynolds numbers

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In