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Title: Turbulent flow in rectangular outlet conduit, Rend Lake Dam, Big Muddy River, Illinois
Authors: United States. Army. Corps of Engineers. St. Louis District.
Pugh, C. A.
Keywords: Conduits
Outlet works
Rectangular conduits
Rend Lake Dam
Big Muddy River
Turbulent flow
Hydraulic gates
Hydraulic structures
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; H-75-2.
Description: Technical Report
Abstract: Tests were conducted in a 4-by 6-ft concrete conduit at Rend Lake Dam, Big Muddy River, Illinois, in September 1973 to investigate turbulent flow characteristics in a rectangular conduit on a full scale and to provide data for future design work. Two cantilevered velocity probes were used to measure horizontal velocity profiles at 6 points along the inlet region. Piezometric head was measured with embedded piezometers at 12 points along the entire length of the conduit. Average velocity of flow in the conduit was 27ft/sec, and the average Reynolds number was 1.25 x 10⁷. Velocity distributions in the boundary layer were in good agreement with a log-linear velocity profile equation. The coefficients in the velocity profile equation and the shear stress become constant at X/D ≈ 20. Equivalent sand grain roughness values were about the same as those determined by other investigators for circular conduits of comparable size and construction.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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