MAGNITUDE OF HYDRAULIC LOSSES AT JUNCTIONS IN PIPED DRAINAGE SYSTEMS

A combined theoretical and experimental investigation has been made of the magnitude of hydraulic losses produced by storm drain junctions which connect pipes operating under flow-full conditions. The experimental part of the investigation was undertaken using hydraulic models constructed to simulate surcharged flow conditions as they would occur in the prototype. The results of this open pit junction experimental programme have been compared to theoretically derived equations for closed pipe junctions. It was found that maximum hydraulic efficiency is achieved when the junction branch point (ie the point of intersection of the centrelines of the connecting pipes) is located on the downstream face of the pit. In such circumstances resultant energy losses and pressure head changes will be considerably less than those values that have been traditionally used in storm drain design practice. In addition, semi-theoretical equations are presented for the determination of the pressure head change when the branch point of the junction is located on the downstream face. For less efficient geometries, reference is made to sources of available design data. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0858251574
• Corporate Authors:

  Institution of Engineers

  11 National Circuit
  Barton, A.C.T.,   Australia 
• Authors:
  • Hare, C M
• Publication Date: 1983-2

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 71-77
• Serial:
  • Institution of Engineers (Australia) Civ Eng Trans
  • Volume: CE 2
  • Issue Number: 1
  • Publisher: Institution of Engineers
  • ISSN: 0819-0259

Subject/Index Terms

• TRT Terms: Couplers; Drainage; Gullies; Hydraulic fluids; Hydraulics; Intersections; Loss and damage; Losses; Pipe; Pressure; Prototypes; Surfaces; Water
• Uncontrolled Terms: Surcharge
• ITRD Terms: 8525: Conference; 3876: Coupling; 2937: Drainage; 2928: Gully; 5431: Hydraulics (fluid); 455: Junction; 9040: Loss; 3361: Pipe; 9109: Prototype; 6438: Surface; 4355: Water
• Subject Areas: Bridges and other structures; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00378339
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0 85825 157 4
• Files: ITRD, TRIS, ATRI
• Created Date: Oct 30 1983 12:00AM