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Client

Description of model

Picture

Berg River Consultants

Berg River Project - Water supply to Cape Town, South Africa. Outlet works. (Flow rate = 220 m³/s) Scale – 1:20

BKS

Resolving the failure of the Paris Dam inlet works: Vortex formation and pressure fluctuations in the inlet pipes

Ninham Shand

Model study of the Maguga dam regulating weir – Stabilisation of the releases

Rand Water

Model study of the Vortex Protection Measures at Vereeniging Pump Station (ER 2), Filter House 2 suction manifold (Flow in manifold between 3,4 and 4,0 m³/s). Scale - 1:13,5

SULZER SA

Grootfontein Pump station in South Africa, (Flow per pump = 2,1 m³/s – four pumps). Scale - 1:6,5

Problems were experienced since the commissioning of the pump station. The high wear on the pumps has been investigated before and model studies have previously been conducted to determine the probable factors that contributed to the pump failures.

This model study investigated the following: oEvaluate the flow regime in the vertical shaft
oInvestigate the pre-rotation at the pumps
oEvaluate the influence of proposed remedial works to the vertical shaft to improve the pump operation.

SULZER SA

Ashkelon Seawater Pump station, Israel. (Flow per pump = 2,4 m³/s, five pumps modelled). Scale 1:8

In a pump station the three-dimensional flow regime in the sump can influence the efficiency of the pump and might even endanger its long-term operation. These flow conditions can be evaluated by conducting a model study with the objective to:

•Evaluate the flow regime and vortex formation tendency in the screen and pump sumps
•Evaluate the rotational characteristics of the flow as it enters the pump and
•Investigate the velocity distribution in the pump shaft.

SULZER SA

Sheikh Zayed Pump Station in Egypt, (Flow per pump = 8,5 m³/s – 7 pumps). Scale 1:10

The client has requested that a model study had to be performed with the objective to:

o Evaluate the flow regime and vortex tendency in the pump sump
o Investigate the formation of vortices
o Evaluate the influence of the turning vanes on the inlet flow conditions and the velocity profile in the pump.
 

SULZER SA

Chanza Pump Station in Spain, (Flow per pump = 3,33 m³/s – 6 pumps). Scale 1:11,5. These pumps are vertical risers with a double entry

WRC

Numerical and physical modelling of discontinuity requirements under an air valve for effective de-aeration performed in collaboration with the CFD lab of the University of Pretoria

Knight Piésold Consulting Engineers

Hydraulic assessment of the spillway and energy dissipation of the Neckertal Dam - Namibia

HydroAfrica, Maputo - Mozambique

Umbelusi pump station - solving the cavitation induced conditions upstream from the pump inlets