Study of the Characteristics of The Hydraulic Jump in A Stilling Basin with An Adverse Slope and Different Baffle Blocks

Authors

1 Departmen of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran.

2 Department of Civil Engineering, Faculty of Engineering, Urmia University, Urmia, Iran

3 Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran

Abstract

Hydraulic jump is a type of rapidly varying flow that occurs when the flow regime transitions from supercritical to subcritical. In this phenomenon, the flow depth increases rapidly over a short distance, accompanied by high turbulence, which results in significant local energy loss and a marked reduction in flow velocity. Hydraulic jumps are commonly utilized in energy dissipators downstream of various hydraulic structures, such as stilling basins, to enhance the dissipation of flow energy. While substantial research has focused on the performance of stilling basins and the control of hydraulic jumps within them, there has been limited comprehensive study on the characteristics of hydraulic jumps within stilling basins under different adverse slopes and with various baffle block configurations. The present study investigates the impact of baffle blocks with varying shapes and dimensions placed on a horizontal bed, along with three adverse slopes of 2.60%, 5.20%, and 7.55%, positioned downstream of a stepped chute. The primary objective of this study is to examine the relative residual energy and the characteristics of the hydraulic jump, including the variations in jump length, sequent depth ratios, and the percentage reductions in both jump length and sequent depth.

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References

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