Effects of Geometrical Parameters on Labyrinth Weir Hydraulics
Publication: Journal of Irrigation and Drainage Engineering
Volume 148, Issue 10
Abstract
The effects of geometrical parameters (crest height, number of cycles, and plan weir configuration), are investigated experimentally on labyrinth weirs, over a range of headwater ratios of 0.1 to 0.6. Trapezoidal and triangular weirs have a constant angle , whereas rectangular weirs have the same footprint size as the trapezoidal configuration. Data uncertainties are quantified at a relatively small overall average of 1.88%. For taller labyrinth weirs, current experimental models achieve lower discharge coefficients when all other geometrical parameters are kept the same. Increasing the number of cycles also leads to a reduction in flow rate and discharge coefficient. These hydraulic performance reductions were most significant for trapezoidal followed by rectangular and triangular configurations. For the same geometrical conditions, a rectangular configuration had a higher flow rate for each head, followed by trapezoidal and then triangular. Nappe behaviors were significantly different between the configurations, whereas modifying the geometrical ratios had less significant effects on the flow characteristics of each configuration.
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Data Availability Statement
All data and models generated or used during the study appear in the published article.
Acknowledgments
This study was funded by the Department of Water Engineering at the University of Tabriz and the Department of Mechanical Engineering at the University of Wyoming through Dr. Mousaviraad’s startup funds.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 148 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Jan 21, 2020
Accepted: Apr 12, 2022
Published online: Jul 18, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 18, 2022
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