Experimental investigation of the discharge coefficient of labyrinth weirs with asymmetric cycles

Authors

  • Hossein Elahifar Department of Water Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
  • Omid Tayari Department of Civil Engineering, Tehran North Branch, Islamic Azad University, Tehran, Iran
  • Najme Yazdanpanah Department of Water Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran
  • Mehdi Momeni Department of Civil Engineering, Kerman Branch, Islamic Azad University, Kerman, Iran

DOI:

https://doi.org/10.17159/wsa/2022.v48.i3.3911

Keywords:

asymmetric width ratio, labyrinth weir, discharge coefficient, weir length ratio, hydraulic head

Abstract

This  study investigated the discharge coefficient in asymmetric rectangular labyrinth weirs. A dimensional analysis was carried out which showed that the discharge coefficient is a function of dimensionless parameters, such as the ratio of asymmetric widths of left and right cycles (wL/wR), the ratio of the total hydraulic head to the weir height (Ht/P), and the weir length ratio (B/wavg). The experimental results for the discharge coefficient were found to decline as wL/wR increased or B/wavg decreased. For wL/wR = 1.19, the ratio B/wavg = 2.76 improves the discharge coefficient by nearly 12.7% compared to B/wavg = 3.1. For wL/wR = 1.42, the ratio B/wavg = 2.76 improves the discharge coefficient by nearly 34.2% compared to B/wavg = 3.1. For wL/wR = 1.70, the ratio B/wavg = 2.76 improves the discharge coefficient by nearly 30% compared to B/wavg = 3.1.

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Published

2022-07-27

Issue

Vol. 48 No. 3 July (2022): Water SA

Section

Research paper

License

Copyright (c) 2022 Hossein Elahifar, Omid Tayari, Najme Yazdanpanah, Mehdi Momeni

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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The content of this journal is licensed under a Creative Commons Attribution Licence.  Users are permitted to read, download, copy, distribute, print, search or link to the full texts of the articles in this journal under the terms of this Licence, without asking prior permission from the publisher or the author, provided the source is attributed. Copyright is retained by the authors.

How to Cite

Hossein Elahifar (2022) “Experimental investigation of the discharge coefficient of labyrinth weirs with asymmetric cycles”, Water SA, 48(3 July). doi:10.17159/wsa/2022.v48.i3.3911.