Cavitation Induced Accelerated Erosion In Large Slurry Pumps

Madadnia, J; Owens, J

Cavitation Induced Accelerated Erosion In Large Slurry Pumps

Madadnia, J Owens, J

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Publisher:: HEFAT
Publication Type:: Conference Proceeding
Citation:: Proceedings of the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2010), 2010, pp. 2103 - 2109
Issue Date:: 2010-01

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Field	Value	Language
dc.contributor.author	Madadnia, J	en_US
dc.contributor.author	Owens, J	en_US
dc.contributor.editor	Meyer, JP	en_US
dc.date	2010-07-19	en_US
dc.date.issued	2010-01	en_US
dc.identifier.citation	Proceedings of the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2010), 2010, pp. 2103 - 2109	en_US
dc.identifier.isbn	978-1-86854-818-7	en_US
dc.identifier.uri	http://hdl.handle.net/10453/16359
dc.description.abstract	Centrifugal slurry plumps experience accelerated erosion. Research to understand and to control has been inconclusive. This investigation is being conducted to qualitatively examine the patterns of accelerated erosion in the samples photographed or collected from slurry pumps in the field, and to compare with the patterns on an aluminium specimen eroded by a submerged fast moving cavitating water jet in abrasives. The selected field samples are a front liner, and the front shroud of an impeller. The examination has resulted in: (1) Identification of three areas in slurry pumps which experience accelerated erosion the front liner, the front shroud and the impellerâs vanes. (2) Identification of the three common features both in the samples and in the aluminium specimen; namely: directional groves along the direction of the main slurry-flow, cavities and pitting, and the embedding of abrasive in the surfaces. The paper concludes the common features of localised cavitation and corresponding accelerated erosion in slurry pumps which are observed in the lowest local pressure areas. The current definition of cavitation is based on the lowest mean-pressure in the cross section area is replaced with a lowest-localpressure based definition which is followed with redefinition of the Cavitation Number based on local parameters, the flow mapping of vortexes, vortices, flow separation behind obstacles, and tensile forces within a velocity boundary layer, and prediction of localised cavitation at the design stage, and adopting cavitation erosion preventative measures such as air entrainment in erosion areas.	en_US
dc.publisher	HEFAT	en_US
dc.relation.ispartof	Proceedings of the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2010)	en_US
dc.relation.ispartof	International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics	en_US
dc.title	Cavitation Induced Accelerated Erosion In Large Slurry Pumps	en_US
dc.type	Conference Proceeding
utslib.location	Antalya, Turkey	en_US
utslib.location.activity	Antalya, Turkey	en_US
utslib.for	091504 Fluidisation and Fluid Mechanics	en_US
dc.location.activity	Antalya, Turkey	en_US
dc.location.activity	ISI:000289235100012
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access
pubs.consider-herdc	true	en_US
pubs.place-of-publication	Antalya, Turkey	en_US
pubs.start-date	2010-07-19	en_US

Abstract:

Centrifugal slurry plumps experience accelerated erosion. Research to understand and to control has been inconclusive. This investigation is being conducted to qualitatively examine the patterns of accelerated erosion in the samples photographed or collected from slurry pumps in the field, and to compare with the patterns on an aluminium specimen eroded by a submerged fast moving cavitating water jet in abrasives. The selected field samples are a front liner, and the front shroud of an impeller. The examination has resulted in: (1) Identification of three areas in slurry pumps which experience accelerated erosion the front liner, the front shroud and the impellerâs vanes. (2) Identification of the three common features both in the samples and in the aluminium specimen; namely: directional groves along the direction of the main slurry-flow, cavities and pitting, and the embedding of abrasive in the surfaces. The paper concludes the common features of localised cavitation and corresponding accelerated erosion in slurry pumps which are observed in the lowest local pressure areas. The current definition of cavitation is based on the lowest mean-pressure in the cross section area is replaced with a lowest-localpressure based definition which is followed with redefinition of the Cavitation Number based on local parameters, the flow mapping of vortexes, vortices, flow separation behind obstacles, and tensile forces within a velocity boundary layer, and prediction of localised cavitation at the design stage, and adopting cavitation erosion preventative measures such as air entrainment in erosion areas.

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http://hdl.handle.net/10453/16359