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

IF 1 4区环境科学与生态学 Q4 WATER RESOURCES

Water SA Pub Date : 2022-07-27 DOI:10.17159/wsa/2022.v48.i3.3911

Hossein Elahifar, Omid Tayari, Najme Yazdanpanah, Mehdi Momeni

引用次数: 0

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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非对称循环迷宫堰流量系数的试验研究

研究了不对称矩形迷宫堰的流量系数。量纲分析表明，流量系数是左右循环不对称宽度比(wL/wR)、总水头与堰高比(Ht/P)、堰长比(B/wavg)等无量纲参数的函数。实验结果表明，流量系数随水宽比增大或波宽比减小而减小。当wL/wR = 1.19时，B/wavg = 2.76比B/wavg = 3.1提高了近12.7%的流量系数。当wL/wR = 1.42时，B/wavg = 2.76比B/wavg = 3.1提高了近34.2%的流量系数。当wL/wR = 1.70时，B/wavg = 2.76比B/wavg = 3.1提高了近30%的流量系数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water SA 环境科学-水资源

CiteScore

2.80

自引率

6.70%

发文量

审稿时长

18-36 weeks

期刊介绍： WaterSA publishes refereed, original work in all branches of water science, technology and engineering. This includes water resources development; the hydrological cycle; surface hydrology; geohydrology and hydrometeorology; limnology; salinisation; treatment and management of municipal and industrial water and wastewater; treatment and disposal of sewage sludge; environmental pollution control; water quality and treatment; aquaculture in terms of its impact on the water resource; agricultural water science; etc. Water SA is the WRC’s accredited scientific journal which contains original research articles and review articles on all aspects of water science, technology, engineering and policy. Water SA has been in publication since 1975 and includes articles from both local and international authors. The journal is issued quarterly (4 editions per year).