The effect of trimming of radial impellers on the hydraulic performance of low specific-speed centrifugal pumps is studied. Prediction methods from literature, together with a new prediction method that is based on the simplified description of the flow field in the impeller, are used to quantify the effect of trimming on the hydraulic performance. The predictions by these methods are compared to measured effects of trimming on the hydraulic performance for an extensive set of pumps for flow rates in the range of 80% to 110% of the best efficiency point. Of the considered methods, the new prediction method is more accurate (even for a large impeller trim of 12%) than the considered methods from literature. The new method generally overestimates the reduction in the pump head after trimming, and hence results less often in impeller trims that are too large when the method is used to determine the amount of trimming that is necessary in order to attain a specified head.
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August 2018
Research-Article
Prediction of the Effect of Impeller Trimming on the Hydraulic Performance of Low Specific-Speed Centrifugal Pumps
D. G. J. Detert Oude Weme,
D. G. J. Detert Oude Weme
Flowserve Etten-Leur,
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands;
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands;
Department of Mechanical Engineering,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Search for other works by this author on:
N. P. Kruyt,
N. P. Kruyt
Department of Mechanical Engineering,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
Search for other works by this author on:
E. J. J. van der Zijden
E. J. J. van der Zijden
Flowserve Etten-Leur,
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands
Search for other works by this author on:
D. G. J. Detert Oude Weme
Flowserve Etten-Leur,
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands;
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands;
Department of Mechanical Engineering,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
M. S. van der Schoot
N. P. Kruyt
Department of Mechanical Engineering,
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
University of Twente,
P.O. Box 217,
Enschede 7500 AE, The Netherlands
E. J. J. van der Zijden
Flowserve Etten-Leur,
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands
Parallelweg 6,
Etten-Leur 4878 AH, The Netherlands
1Flowserve Hengelo.
2Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 12, 2017; final manuscript received January 25, 2018; published online March 29, 2018. Assoc. Editor: Bart van Esch.
J. Fluids Eng. Aug 2018, 140(8): 081202 (7 pages)
Published Online: March 29, 2018
Article history
Received:
July 12, 2017
Revised:
January 25, 2018
Citation
Detert Oude Weme, D. G. J., van der Schoot, M. S., Kruyt, N. P., and van der Zijden, E. J. J. (March 29, 2018). "Prediction of the Effect of Impeller Trimming on the Hydraulic Performance of Low Specific-Speed Centrifugal Pumps." ASME. J. Fluids Eng. August 2018; 140(8): 081202. https://doi.org/10.1115/1.4039251
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