Flow Structure and Local Scour around a Plate with Footing

DOI

Bibliographic Information

Other Title
  • 開水路流れに設置した台座付平板周りの流れと局所洗掘について

Abstract

Around a plate with footing in an open channel flow, vortexes separate from the edge of the plate and are carried away, and horse-shoe vortex and secondary flow can be observed. In this paper these phenomena are discussed by experimental results. The secondary flow is very strong and influences on vortex stretching of the separated vortexes. This secondary flow also has a close relation with local scour around the plate. The influence of the secondary flow on the vortex stretching is studied by flow visualization and velocity measurements. The results show that the secondary flow stretches the vortexes vertically, and makes them strong and stable. Another experiments are carried out for investigating the relation between the secondary flow and local scour in a channel with movable bed. The results show that the horse-shoe vortex is not dominant around the plate with footing, but the secondary flow is dominant there. In this case, the deepest scouring hole is formed apart from the footing.

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Details 詳細情報について

  • CRID
    1390282680184671744
  • NII Article ID
    130004258049
  • DOI
    10.2208/journalam.2.657
  • ISSN
    1884832X
    13459139
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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