HY8:Tumbling Flow in Circular Culverts: Difference between revisions

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Revision as of 20:10, 9 January 2013

The only input variable required for this calculation is the following:

  • Diameter of enlarged culvert


The following figures show implementations of tumbling flow within circular culverts along with the variables used to design the energy dissipator.

HY8fig7-1.jpg

Variables from the figure

  • D -- Diameter of original culvert
  • Vn -- Tailwater velocity
  • yn -- Tailwater depth
  • L -- Length from beginning of one roughness element to the beginning of the next roughness element.
  • h -- Height of roughness element
  • h1 -- length from top of roughness element to enlarged culvert ceiling
  • h2 -- height of splash shield on enlarged culvert ceiling.
  • h3 -- rise of enlarged culvert.

HY8fig7-4.jpg

Variables from the figure

  • D -- Diameter of original culvert
  • D1 -- Diameter of enlarged culvert
  • Di -- Diameter of roughened section
  • h -- Height of roughness element
  • L -- Length from beginning of one roughness element to the beginning of the next roughness element.

HY8image6.jpg

Variables from the figure

  • D -- Diameter of original culvert
  • T -- Water surface width at critical flow condition
  • y -- Depth of flow