A comparative analysis of air-water flow properties was performed between two geometrically scaled stepped spillway models with step height of 5 and 10 cm respectively. The experiments were conducted in the same large size facility with chute slope of 26.6° and with the same phase-detection intrusive measurement devices. A full range of macroand microscopic air-water flow properties was tested ...

Stepped spillways have been increasingly used to handle flood releases from large dams associated with hydropower plants, and it is important evaluate the fluctuating pressure field on steps. Hydraulic model investigations were conducted three 53° (1V:0.75H) sloping relatively large-stepped chutes characterize mean, fluctuating, extreme pressures acting most critical regions of step faces, near...

Stepped spillways are current method of choice for safe discharge flood water due to their inherent ability employ stepping nature safely dissipate substantial energy. Hence, the authors in this study aim provide design engineers new models estimating energy dissipation a stepped spillway with an equal step heights and widths 0.3 m. Many researchers have investigated both hydraulic geometric re...

ABSTRACT Aerator systems promote additional insertion of air into the flow and can reduce risk cavitation consequent damage to hydraulic structures. This work analyzes hydrodynamic pressures on steps a physical model (with chute inclination 53.13º) subjected different aeration conditions. When comparing results with intake coefficients in flow, it was concluded that incorporation does not chang...

The lack of sidewalls in a spillway leads to lateral expansion the flow and, consequently, non-uniform transversal rate distribution along chute. present work shows velocity field measured physical model 1 V:0.8 H steeply sloping stepped without sidewalls. An application Bubble Image Velocimetry (BIV) technique self-aerated region is shown, using air bubbles entrained into downstream inception ...