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:
  • Flumes
  • Culvert inlets
  • Geometric design
  • Hydraulics
  • Drainage structures
  • Runoff
  • Flow
• 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
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27341/dot_27341_DS1.pdf
• File Type:
  [PDF - 8.24 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:070d34e632ae077044350436855b673ee57a5ab948c1a96afe18aeb9838b3939bbadc58d073d23fdc712b08170817d3356b3e1ca448ed0582b0e6378ddd22edd