TRANSPORTATION PROBLEMS OF SAND-WATER MIXTURES IN PIPELINES AND CENTRIFUGAL PUMPS

In order to realize the desired high profitability of dredging installations the components of the system must be matched to each other. To match the components effectively the factors of loosening and picking up the material, transporting it, and depositing it must be understood. The author describes tests he has made to determine the behavioral characteristics of the materials commonly transported in dredging operations while they are in the pipelines and also while in centrifugal pumps. Tests were carried out using an assortment of different sands and gravels of carrying shapes and sizes to determine the terminal falling velocities of the materials and the wearing of the particles. His conclusions from these tests are given in detail. He then discusses the behavior of these materials in pipelines under different conditions of density, mixtures, and flow velocities. The author also tested the behavior of five sands and gravels of different volumetric concentrations in two different centrifugal pumps under differing speeds of rotation. These transportation and paint wear test results pointed to the final conclusion that the friction paths followed by the mixture in the pump should be kept as short as possible, and path deflections should be made as gradual as possible in order to achieve good transport behavior and low wear.

  • Corporate Authors:

    World Trade Publications, Incorporated

    P.O. Box 20810
    Long Beach, CA  USA 
  • Authors:
    • Wiedenroth, W
  • Publication Date: 1971-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00028751
  • Record Type: Publication
  • Source Agency: United States Merchant Marine Academy
  • Files: TRIS
  • Created Date: Mar 28 1974 12:00AM