Pipe size effect on hydraulic transport of Jumoonjin sand ­ Experiments in a dredging test loop
Type:
Presented during:
WODCON XVII: "Dredging in a Sensitive Environment" - 2004, Hamburg, Germany
Authors:
M. S. Lee, V. Matousek, C. K. Chung, and Y. N. Lee
Abstract: The diameter of a slurry pipeline is an important factor in a design and an operation of a pipeline&pump system connected with a dredge. However, the effect of pipe diameter on the slurry flow behavior (frictional head losses, specific energy consumption, deposition-limit velocity) is not well understood. Moreover, there is a lack of experimental data that could be used to study the pipe size effect on slurry flow behavior and thus on efficiency of slurry transport operation.
Recently, tests were carried out in the dredging test loop of Hyundai Institute of Construction Technology with an aim to collect information on the effect of pipe size on pipeline characteristics (I-V curves and specific energy curves) for aqueous slurries of the Jumoonjin sand (a medium to coarse sand with d50 = 0.54 mm). The measurements were carried out in straight horizontal pipelines of three different diameters 155 mm, 204 mm, 305 mm. The paper describes and analyzes results of these tests.
Keywords: sand-water mixture, slurry flow, pipeline, pipe size effect, specific energy consumption