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Surface Ripple Formation Due to Solid-Liquid Slurry Erosion

[+] Author Affiliations
Juan Liu

China Institute of Water Resources & Hydropower Research, Beijing, China

Paper No. IMECE2009-10204, pp. 61-65; 5 pages
doi:10.1115/IMECE2009-10204
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4382-6 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

The development of ripples and erosion on the material surfaces in a centrifugal slurry pump was investigated in laboratory tests using a sand-water slurry pot tester. The erosion of the primary material (KmTBCr26) used in the centrifugal slurry pumps was very serious. The ripple formation was influenced by the flow conditions, the impact angle of the solid particles and the particle size. Ripple formation was also observed in laboratory tests with structural steel (#40) and brittle ceramics (Al2 O3 , ZTA, Si3 N4 ). The ripple profile on the structural steel surface was similar to that on the high chrome cast iron (Cr26) used in the slurry pumps. With 90° impact angles, ripples also formed on the eroded surfaces of materials tested in the sand-water slurry pot. The ripple wavelength on the ceramic surface, which was influenced by the mechanical properties and material grain size, was less than that on the metallic surfaces.

Copyright © 2009 by ASME
Topics: Erosion , Slurries

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