Hydraulics of Rotary Gate: Novel Structure for Semicircular Canals
Publication: Journal of Irrigation and Drainage Engineering
Volume 147, Issue 4
Abstract
In this study, a new structure named a rotary gate is introduced to control and measure the flow in canals having a semicircular or semielliptical cross section. A pivot rod, connected to the centerline of the gate and to its frame, holds the gate in place and acts as a hinge for the gate rotational movement. The gate is easy to maneuver and requires a rather small force for its movement, which makes it appropriate for network automation. The hydraulic properties of the rotary gate were investigated during an intensive experimental study and presented in this paper. Influences of the gate opening angles on the flow depths, discharge measurements, and discharge coefficients in free flow were studied using different approaches, and the results of developed relationships were evaluated. Finally, a relationship to determine the relative head loss of the gate according to the relative opening and the relative discharge was proposed.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Data that includes discharge, upstream flow depth, and the gate opening angle will be provided.
Acknowledgments
The experimental facility provided by the Irrigation and Reclamation Engineering Department, University of Tehran, is highly acknowledged. Also, the first author would like to thank the Ministry of Science, Research and Technology, I.R. Iran, for the partial financial support for the sabbatical leave spent at the University of Tehran.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 147 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Apr 5, 2020
Accepted: Oct 7, 2020
Published online: Jan 30, 2021
Published in print: Apr 1, 2021
Discussion open until: Jun 30, 2021
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