Experimental study of the limiting flow discharge and the main characteristics of the hydraulic jump in a vertical "U" shaped channel

Abstract

The hydraulic jump is one of the most effective tools for dissipating the energy of water discharged downstream of dams. In this context, the experimental and  theoretical studies were conducted to answer some questions related to the hydraulic characteristics of the jump evolving in a vertical U-shaped channel with a horizontal bottom. Experiments were performed to examine how the downstream relative depth, , changed as a function of the relative discharge q, or as a function of the inflow Froude number, F₁ and how the limiting relative discharge qlim changed as a function of  and how to know if the hydraulic jump will develop in the section or only in the semi-circular part by having as data only the relative flow discharge and the upstream relative depth . This paper also examines the free-surface profile of the hydraulic jump. The experimental and theoretical variations of the jump efficiency studied were plotted as a function of the inflow Froude number .