Sluice gates are structures to regulate water flows. The force acting on the gate depends on the pressure distribution, which is hydrostatic if the gate is closed and hence has no discharge. Under operating conditions, the pressure is the difference between the hydrostatic and the dynamic pressure. These values are chaining depending on the relative gate opening ß , which is the quotient of the upstream water level ho&nbsp;to the opening height a.The hydrostatic pressure increases not only linearly with increasing upstream water level, but also through an increase in water level at the sluice gate wall, due to stagnating water at the upper edge, were the kinetic energy is converted in potential energy.&nbsp;The dynamic pressure is increasing from the water surface to the lower sluice gate edge. However, the flow is not attached up to the top of the sluice gate, since at the top an eddy is generated between the upstream streamline close to the water surface, the sluice gate wall and the free water surface. At this eddy, the velocity and hence also the dynamic pressure are low. Under this eddy the flow is attached and the dynamic pressure increases with decreasing distance to the lower sluice gate edge.The study includes an analysis and parametrization of the increase in water level, the vortex height at the sluice gate top and the increase in dynamic pressure along the gate. Using these results, the sluice gate pressure profile was parametrized and the dependency on the relative gate opening was determined. The results of the current study are compared and discussed with previous theoretical and experimental studies on the gate pressure profile showing a very good agreement.

Impact of Flow Characteristics on the Pressure Distribution on Sluice Gates

Paper Proceedings: https://asmedigitalcollection.asme.org/FEDSM/FEDSM2021/volume/85284

ASME 2021 Fluids Engineering Division Summer Meeting (FEDSM2021)

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