Experimental Investigation on Hydraulic Efficiency of Vertical Drop Equipped with Vertical Screens

Authors : Rasoul DANESHFARAZ, Sina SADEGHFAM, Vadoud HASANNİYA, John ABRAHAM, Reza NOROUZİ

Pages : 12379-12399

Doi:10.18400/tekderg.755938

View : 8 | Download : 3

Publication Date : 2022-09-01

Article Type : Research Paper

Abstract :In the present study, vertical screens were utilized at downstream of vertical drops to increase the energy dissipation of subcritical flow. The experiments were carried out using screens with two different porosity ratios insert ignore into journalissuearticles values(40% and 50%); and three different distances from the drop brink insert ignore into journalissuearticles values(30, 60 and 90 cm);. The results reveal that drops equipped with screens increase the relative downstream depth, the relative pool depth, and the relative energy dissipation compared with a plain vertical drop. By increasing porosity ratios and the screen distance from the drop brink, the relative downstream depth and relative energy dissipation increase, whereas the relative pool depth decreases. Also, by increasing the relative critical depth, the relative energy dissipation of the vertical drop decreases, whereas the energy dissipation related to the screens increases. However, increasing the relative critical depth initially increases and then decreases the performance of the hydraulic jump in terms of total energy dissipation.
Keywords : Energy dissipation, hydraulic jump, screen, vertical drop