Energy dissipation using multi-pendulum sill downstream sluice gate.

Abstract

Many researchers have already investigated different energy dissipator designs both theoretically and empirically in order to maximize energy dissipation and minimize length for the hydraulic jump. This study introduces a novel method to decrease the hydraulic structure's floor length and boost energy dissipation. To do this, a pendulum sill is used downstream of the hydraulic structure's sluice gate. The pendulum sills are hollow plastic cylinders, 29.5 cm long and diameter of 5.00 cm, with a wall thickness of 5 mm, and filled with constant stones. The sill location was changed with respect to the hydraulic jump by changing the string length. The number of sills was studied by using one; two and three sills tied each other by intermediate strings. The results showed that using the pendulum sill increased the energy dissipation. It was found that the best case is to use three cylinders, as the energy dissipation increases by approximately 55%.