RESEARCH OF FLOW KINEMATICS IN THE LOCAL EROSION AREA OF THE LOWER BYEF OF THE STRUCTURE

Abstract

The presented article examines the determination of hydraulic conditions in the junction sections of bays during the design of water discharge hydraulic structures, which has important scientific and practical significance. In these areas, sharp changes in flow regime are observed, during which the flow transitions from a turbulent, i.e., supercritical, state to a calm, or subcritical state. It has been established that such a transition is possible only through the phenomenon of a hydraulic jump, which represents a complex hydrodynamic process. Reducing the excess energy of the flow is carried out by various forms of jumps - bottom or surface type, as well as by the method of free discharge of the jet. The correct choice of energy dissipation method contributesto the effective reduction of the destructive impact of the flow, ensures the longterm operational stability of the hydraulic structure, and increases its reliability and safety in various hydrological conditions.