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Energies 2019, 12(1), 158; https://doi.org/10.3390/en12010158

Alternative Design of Double-Suction Centrifugal Pump to Reduce the Effects of Silt Erosion

1
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, No. 8 South East Lake Road, Wuhan 430072, China
2
Turbine Testing Laboratory, Kathmandu University, P.O. Box 6250, Dhulikhel, Nepal
*
Author to whom correspondence should be addressed.
Received: 26 November 2018 / Revised: 24 December 2018 / Accepted: 24 December 2018 / Published: 3 January 2019

Abstract

Large amounts of sediment in the Himalayan rivers causes severe silt erosion to the hydraulic machinery operating along these rivers. In this study, the effects of silt characteristics on the silt-erosion characteristics of a double-suction centrifugal pump was studied and the anti-erosion property of bionic convex domes on silt erosion under these conditions was explored by using computational-fluid-dynamics methods, partly supported by a painted-blade erosion experiment. The results show that the silt size affects the erosion position and erosion strength, whereas the silt concentration mainly affects the erosion strength for the studied range. The bionic convex domes provide an effective solution to improve the silt erosion for most of the investigated silt-laden conditions by decreasing the erosion rate and the erosion area of the blade. The anti-erosion mechanism was studied combined with large eddy simulation. The analysis shows that the relative velocity of water around the blade surface is changed and the mass flow rate of silt particles hitting the blade is reduced by inducing swirling flows around the bionic convex domes. View Full-Text
Keywords: silt erosion; double-suction centrifugal pump; silt characteristics; bionic convex domes silt erosion; double-suction centrifugal pump; silt characteristics; bionic convex domes
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Dong, J.; Qian, Z.; Thapa, B.S.; Thapa, B.; Guo, Z. Alternative Design of Double-Suction Centrifugal Pump to Reduce the Effects of Silt Erosion. Energies 2019, 12, 158.

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