Investigating Flow Characteristics Under Effect of Modified Vertical Gate

Abstract

There is no doubt that, the gates one of the most important controllers of the flow through regulators. Several studies had been conducted to improve the gates' performance by modifying its features to improve the flow characteristics. It can be said that, no studies focused on the gate as an energy dissipater. The present paper investigates the possibility of using the gate as a tool of the flow controlling through the basin itself. We have provided a new idea based on perforating of a hole in the gate itself. It plays an important rule to improve the hydraulic jump's characteristics and the coefficient of discharge. Theoretical models are built to simulate each of the dissipated energy values and Froude's number. The laboratory experiments achieved promising results. It was found that, the case of sluice gate with a circular opening and plastic hose of inclination angle = 330o reduces the relative jump depth and the relative jump length by 12.3% and 29%, respectively. In addition, it increases the average values of the dissipated energy and the coefficient of discharge by 8% and 16.5%, respectively. Statistical analysis is used in the construction of equations to simulate the above-mentioned parameters.