Abstract
BackgroundLocal scour is one of the main problems affecting the stability and operation of control hydraulic structures. Many techniques were used to control the resulting scour. In the recent study, a new technique was used to control local scour downstream single-gate hydraulic regulator by using side flow jets. This study aimed to demonstrate the effect of side jets at different angles on the local scour parameters (depth, length, and volume) and energy dissipation in the downstream hydraulic regulator.ResultsA physical model was used to represent the open channel, regulator, and the side jets with different angles. Five flow discharges, four jet angles, and three gate openings were applied through the experiment. The experiment results showed that the presence of side jets had a remarkable effect on the parameters of the local scour hole and energy dissipation. They dissipated more energy of hydraulic jump than in the absence of jets, and consequently, scour hole dimensions were significantly reduced. Regression analysis was used to deduce equations that can predict the development of local scour downstream sluice gate considering the inclination angle of side flow jets under different flow conditions.ConclusionsSide flow jets can be used as scour reducer techniques with the advantages of eliminating the jet clog produced from sediments and suspended solids.
Highlights
Local scour is one of the main problems affecting the stability and operation of control hydraulic structures
The side flow jets were fixed to the side walls just upstream the bed level at a distance of Distance of jet from the gate (Xj)/Length of apron (Xa) = 0.41 downstream the gate, as Xj is distance of jet from the gate and Xa is the length of apron
Side flow jets were examined for a range of positive angles between 90° and 150° at different flow conditions and compared to the reference case of without jet to define the scour evolution and energy dissipation
Summary
Local scour is one of the main problems affecting the stability and operation of control hydraulic structures. Many techniques were used to control the resulting scour. A new technique was used to control local scour downstream single-gate hydraulic regulator by using side flow jets. This study aimed to demonstrate the effect of side jets at different angles on the local scour parameters (depth, length, and volume) and energy dissipation in the downstream hydraulic regulator. Local scour can gradually damage the bed material, which eventually leads to structural failures. Scour process downstream gates have been extensively investigated [8,9,10,11,12,13,14,15,16]. Dey and Sarkar [17] studied the scouring process and profiles in non-cohesive
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Beni-Suef University Journal of Basic and Applied Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
