Study on the Hydraulic Characteristics of the Trapezoidal Energy Dissipation Baffle Block-Step Combination Energy Dissipator

The step-type energy dissipator is widely used to construct small- and medium-sized reservoirs with its high dissipation rate. In order further improve air entrainment characteristics dissipation, reduce the influence of cavitation, in this paper, we added a trapezoidal baffle block at convex corner traditional step form block-step combination dissipator. We hydraulic model experiments numerical simulation study characteristics. results showed that initial point, increase flow rate, gradually moved backward. A horizontal surface pressure change cavity recirculation area prominent “V” shape; front block, there was rising trend, gap, declining trend. vertical decreasing negative appeared near angle. cross-section velocity distribution presented trend being small bottom large surface, gradient longitudinal section nonenergy block. rate reached more than 70% within test range, decreased combined conducive reducing cavitation hazard improving effect, providing reference for engineering design existing dissipators remove risks reinforcement.