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Discharge performance of side gates with different shapes
Veysi Kartal1, M Emin Emiroglu2, M Fatih Yuksel3
1Engineering Faculty, Department of Civil Engineering, Firat University, 23119, Elazig, Türkiye; Engineering Faculty, Department of Civil Engineering, Siirt University, 56000, Siirt, Türkiye
Summary
This study investigated lateral intake structures for open channel flow measurement. Triangular and semi-circular gates showed higher discharge coefficients under specific conditions, leading to a new reliable equation.
Area of Science:
- Civil Engineering
- Environmental Engineering
- Fluid Mechanics
Background:
- Accurate flow measurement and water level control in open channels are crucial for effective water management.
- Lateral intake structures are essential components in various civil and environmental engineering applications.
Purpose of the Study:
- To experimentally investigate the flow characteristics of rectangular, triangular, and semi-circular lateral intake gates.
- To determine the influence of various parameters on the discharge coefficient for different gate shapes.
- To develop a reliable predictive equation for discharge coefficients in open channel flow.
Main Methods:
- Conducted 357 experimental runs under subcritical flow conditions.
- Performed correlation analysis to identify influential parameters affecting discharge coefficients.
- Tested rectangular, triangular, and semi-circular gate shapes.
Main Results:
- Upstream Froude number (F1), gate opening to flow depth ratio, and gate length to flow depth ratio significantly influence discharge coefficients for all gate shapes.
- Triangular side gates showed higher discharge coefficients for 0.40 < F1 < 0.98, while semi-circular gates were more efficient for 0.05 < F1 < 0.40.
- A new, reliable equation for predicting discharge coefficients of side gates was developed, showing good agreement with experimental data.
Conclusions:
- Gate shape significantly impacts discharge coefficient and efficiency in open channel flow.
- The developed equation provides a valuable tool for engineers in designing and managing lateral intake structures.
- Understanding flow dynamics through different gate geometries is key for optimizing water management systems.
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