Closed flume inlet efficiency.

Details

• Creators:
  Muste, Marian ; Craig, Andrew ; Bayraktar, M. Emre
• Corporate Creators:
  Florida International University. OHL School of Construction ; University of Iowa
• Subject/TRT Terms:
  Culvert Inlets Drainage Structures Flow Flumes Geometric Design Hydraulics Runoff
• Publication/ Report Number:
  BDK80-977-36
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida Department of Transportation
• Abstract:
  The goal of the present study was to determine the efficiency of a specific culvert geometry, labeled as
  
  Index 216 Closed Flume Inlet (CFI) in the FDOT’s Design Standards, and to determine if geometric changes
  
  affect the efficiency of the current design. The experimental study was initiated by testing the impact of
  
  various changes to the Index 216 CFI geometry to determine the optimum configuration with respect to
  
  hydraulic operation. The 4-ft unconstricted geometry was found to be optimal CFI configuration.
  
  Subsequently, extensive series of tests were carried out to estimate the hydraulic performance of this
  
  geometry for a wide range of settings and flow conditions. Final empirical relationships to predict the CFI
  
  intercepted flow have been developed using analysis and visualization. While there are no references to
  
  compare the results obtained in the present study, the hydraulic performance of the tested drainage structures
  
  is aligned with the analytical inferences. Moreover, the trends of the results obtained herein are in agreement
  
  with results of previous studies conducted on similar drainage structure geometry. Overall, it can be
  
  concluded that: (i) increased cross- slopes convey more stormwater through the drainage structure for the
  
  same longitudinal slope and (ii) decreased longitudinal slopes convey more flow through the drainage for
  
  the same cross-slope. The efficiency of the drainage structures for larger cross-slope is modest while a sharp
  
  decrease occurs for larger longitudinal slopes. The assessment of the CFI hydraulic performance also
  
  includes the estimation of the self-cleaning velocity. It is observed that the self-cleaning velocity is exceeded
  
  for all tested situations
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:070d34e632ae077044350436855b673ee57a5ab948c1a96afe18aeb9838b3939bbadc58d073d23fdc712b08170817d3356b3e1ca448ed0582b0e6378ddd22edd
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27341/dot_27341_DS1.pdf
• File Type:
  [PDF - 8.24 MB ]