Calculation of Contraction Coefficient under Sluice Gates and Application to Discharge Measurement
Publication: Journal of Hydraulic Engineering
Volume 135, Issue 12
Abstract
The contraction coefficient under sluice gates on flat beds is studied for both free flow and submerged conditions based on the principle of momentum conservation, relying on an analytical determination of the pressure force exerted on the upstream face of the gate together with the energy equation. The contraction coefficient varies with the relative gate opening and the relative submergence, especially at large gate openings. The contraction coefficient may be similar in submerged flow and free flow at small openings but not at large openings, as shown by some experimental results. An application to discharge measurement is also presented.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 12 • December 2009
Pages: 1086 - 1091
Copyright
© 2009 ASCE.
History
Received: Apr 4, 2008
Accepted: Jun 19, 2009
Published online: Jun 22, 2009
Published in print: Dec 2009
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