publication . Article . 2014

Review of pump suction reducer selection: Eccentric or concentric reducers

Mahaffey, R M; van Vuuren, S J;
Open Access English
  • Published: 01 Oct 2014
  • Publisher: South African Institution of Civil Engineering
Eccentric reducers are traditionally recommended for the pump suction reducer fitting to allow for transportation of air through the fitting to the pump. The ability of a concentric reducer to provide an improved approach flow to the pump while still allowing air to be transported through the fitting is investigated. Computational fluid dynamics (CFD) were utilised to analyse six concentric and six eccentric reducer geometries at four different inlet velocities to determine the flow velocity distribution at the inlet to the pump. It was found that eccentric reducers with angles greater or equal to 15° and concentric reducers with an angle greater or equal to 20°...
free text keywords: pump station design, eccentric and concentric reducers, computational fluid dynamics (CFD), numerical modelling, air transport in pipelines
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