Flow over rectangular sharp-crested weirs

被引：58

作者：

Bagheri, Sara ^{[1
]}

Heidarpour, Manouchehr ^{[1
]}

机构：

[1] Isfahan Univ Technol, Dept Water Engn, Coll Agr, Esfahan 8415683111, Iran

来源：

IRRIGATION SCIENCE | 2010年 / 28卷 / 02期

关键词：

Discharge Coefficient; Maximum Elevation; Velocity Head; Weir Crest; Suggested Equation;

D O I：

10.1007/s00271-009-0172-1

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Sharp-crested weirs are the simplest form of over-flow spillway that commonly used to determine the flow rate in hydraulic laboratories, industry and irrigation systems, where highly accurate discharge measurements are needed. In this study, the experimental upper and lower nappe profiles in rectangular sharp-crested weirs are fitted by quadratic and cubic equations, respectively. In addition, free-vortex theory is used to simulate flow over this kind of weirs and determine discharge coefficient. Physical models of sharp-crested weirs with various widths and heights were considered. The proposed method agrees well with the experimental observations. Also, the experimental data indicate that the suggested equation presents reasonable results for the range of 0 < h/P < 9.

引用

页码：173 / 179

页数：7

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