HY8:Tumbling Flow in Circular Culverts: Difference between revisions

From XMS Wiki
Jump to navigationJump to search
No edit summary
 
No edit summary
Line 12: Line 12:


* D -- Diameter of original culvert
* D -- Diameter of original culvert
* Vn -- Tailwater velocity
* V<sub>n</sub> -- Tailwater velocity
* Yn -- Tailwater depth
* Y<sub>n</sub> -- Tailwater depth
* L -- Length from beginning of one roughness element  to the beginning of the next roughness element.
* L -- Length from beginning of one roughness element  to the beginning of the next roughness element.
* h -- Height of roughness element
* h -- Height of roughness element
* h1 -- length from top of roughness element to enlarged culvert ceiling
* h<sub>1</sub> -- length from top of roughness element to enlarged culvert ceiling
* h2 -- height of splash shield on enlarged culvert ceiling.
* h<sub>2</sub> -- height of splash shield on enlarged culvert ceiling.
* h3 -- rise of enlarged culvert.
* h<sub>3</sub> -- rise of enlarged culvert.


[[Image:HY8fig7-4.jpg]]
[[Image:HY8fig7-4.jpg]]
Line 25: Line 25:


* D -- Diameter of original culvert
* D -- Diameter of original culvert
* D1 -- Diameter of enlarged culvert
* D<sub>1</sub> -- Diameter of enlarged culvert
* Di -- Diameter of roughened section
* D<sub>i</sub> -- Diameter of roughened section
* h -- Height of roughness element
* h -- Height of roughness element
* L -- Length from beginning of one roughness element  to the beginning of the next roughness element.
* L -- Length from beginning of one roughness element  to the beginning of the next roughness element.

Revision as of 20:31, 16 December 2011

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


v • e
HY-8
Introduction:Getting Started   •   Layout   •   Vena Contracta   •   Building a Project   •   Locate Project   •   Culvert Crossing Data   •   Run Analysis   •   Report Generation
Crossing and Culvert Data:Crossings   •   Discharge Data   •   Roadway Data   •   Tailwater Data   •   Irregular Channel   •   Culvert Data   •   Site Data   •   Culvert Invert Data   •   Embankment Toe Data
AnalysisProject Units   •   Roadway Overtopping   •   Inlet Control Computations   •   Outlet Control Computations   •   Tables and Plots
Energy DissipationScour Hole Geometry   •   Increased Resistance   •   Tumbling Flow   •   USBR Type IX Baffled Apron   •   Drop Structures   •   Stilling Basins   •   Streambed Level Structures
MethodsAquatic Organism Passage   •   Low Flow Hydraulics
TroubleshootingDifferences from DOS HY-8   •   Limitations   •   HY-8 User Manual
Retrieved from "https://www.xmswiki.com/index.php?title=HY8:Tumbling_Flow_in_Circular_Culverts&oldid=36246"