Research Article | OPEN ACCESS
Surface Roughness Effects on Discharge Coefficient of Broad Crested Weir
Shaker A. Jalil, Safa S. Ibrahim and Rondk A. Jafer
Department of Water Recourses Engineering, Faculty of Engineering and Applied Science,
University of Duhok, Zakho Way, Duhok, Iraq
Research Journal of Applied Sciences, Engineering and Technology 2014 24:5227-5233
Received: February 22, 2014 | Accepted: April 14, 2014 | Published: June 25, 2014
Abstract
The aim of this study is to investigate the effects of surface roughness sizes on the discharge coefficient for a broad crested weirs. For this purpose, three models having different lengths of broad crested weirs were tested in a horizontal flume. In each model, the surface was roughed four times. Experimental results of all models showed that the logical negative effect of roughness increased on the discharge (Q) for different values of length. The performance of broad crested weir improved with decrease ratio of roughness to the weir height (Ks/P) and with the increase of the total Head to the Length (H/L). An empirical equation was obtained to estimate the variation of discharge coefficient Cd in terms total head to length ratio, with total head to roughness ratio.
Keywords:
Broad crested weir, discharge coefficient, surface roughness, total head,
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Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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