Estimating sediment erosion of a centrifugal dredge pump’s impeller

Sediment erosion is a phenomenon of mechanical wear of components that decreases efficiency and uptime of the dredging process. Dredge pumps are designed to handle mixtures of water and solid particles with varying particle size from less than 0.002 mm to greater than 200 mm. A dredge pump’s overall effectivity in the field depends upon its uptime. Uptime is influenced by the number of times the pumping process is interrupted, which can be due to maintenance combating the material loss, clogging, etc. This research deals with the erosion phenomena by considering a framework of numerical models, capable of qualitative and quantitative erosion estimation, coupled with experiments for validation. Coordinate Measurement Machine (CMM) is used for surface roughness measurement before and after the experiment, thus depicting the material loss due to erosion.

Which slurry transport regime should be used and why?

With five possible flow regimes to choose from for slurry transport, selecting just one can require consideration. Fortunately, one of these regimes has a simple criterion: a ratio of the particle diameter to the pipe diameter.

Pipe Size Effect on Hydraulic Transport of Jumoonjin Sand Experiments in a Dredging Test Loop
Pipe Size Effect on Hydraulic Transport of Jumoonjin Sand Experiments in a Dredging Test Loop

The diameter of a slurry pipeline is an important factor in a design and an operation of a pipeline and pump system connected with a dredger. However, the effect of pipe diameter on the slurry flow behaviour (frictional head losses, specific energy consumption, deposition limit velocity) is not

Numerical Simulation of the Development of Density Waves in a Long Pipeline and the Dynamic System B
Numerical Simulation of the Development of Density Waves in a Long Pipeline and the Dynamic System B

Slurry transport is used in dredging and mining to transport solid/liquid mixtures over a long distance and very frequently multiple pumps are utilised.