TAPERED BOX CULVERT INLETS - SIXTH PROGRESS REPORT ON CULVERTS, NATIONAL BUREAU OF STANDARDS REPORT 9355

THE HYDRAULIC CAPACITIES OF BOX CULVERTS WITH INLET FACE AREAS LARGER THAN THE BARREL AREA WERE INVESTIGATED UNDER CONDITIONS OF FLOW CONTROL AT EITHER THE INLET FACE OR THE THROAT SECTION AT THE END OF THE INLET TAPER. SCALE MODELS WERE USED TO DETERMINE THE CAPACITY OF INLETS WITH THE TOP TAPERED AND WALLS NOT TAPERED, AND WITH SIDE WALL TAPER FROM A WIDE FACE, WITH THE INLET FLOOR AND TOP COPLANAR WITH THE BARREL. THE EFFECTS OF VARIOUS INLET CONFIGURATIONS WERE ESTABLISHED AND EXPRESSED IN ENERGY EQUATIONS RELATING THE RATE OF FLOW TO HEADWATER DEPTH AND TO INLET FACE AREA OR BARREL DIMENSIONS, EACH IN CONNECTION WITH THE INLET TAPER ANGLE. THE DIMENSIONS OF TAPERED INLETS REQUIRED FOR SIGNIFICANT IMPROVEMENT OF HYDRAULIC CAPACITY ARE REPORTED. /BPR/

• Supplemental Notes:
  • Admin, Cpr 11-6528, 213.32 /2130436, 3665-011
• Corporate Authors:

  National Bureau of Standards /US

  /Fluid Mechanics Branch
  ,   United States 
• Authors:
  • French, J L
• Publication Date: 1966-6

Subject/Index Terms

• TRT Terms: Angularity; Box culverts; Culvert inlets; Culverts; Flow control (Air traffic control); Flow equations; Hydraulics; Mathematical models; Ratios; Shape; Tapered traffic lanes
• Uncontrolled Terms: Angles; Capacity; Configuration; Inlets; Models
• Old TRIS Terms: Culvert hydraulics; Flow control; Scale (Ratio); Taper
• Subject Areas: Bridges and other structures; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00203959
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 23 1994 12:00AM