Effect of Different Channels on Discharge Coefficient of Labyrinth Weirs

Authors : Rasoul DANESHFARAZ, Amir GHADERI, John ABRAHAM, Mohammadamin TORABI

Pages : 11081-11096

Doi:10.18400/tekderg.629128

View : 7 | Download : 2

Publication Date : 2021-07-01

Article Type : Research Paper

Abstract :In this study, the effect of channel-bed slope and non-prismatic converging channel on the discharge coefficient of labyrinth weirs is numerically investigated utilizing FLOW-3D model. Numerical simulation results show that modifying the labyrinth weir channel through both methods improves the discharge coefficient. Among the selected bed slopes and converging channel wall, the slope of β=4% and angle of θ=10° yielded the highest discharge coefficient. For a ratio HT/P=0.1, insert ignore into journalissuearticles values(HT: flow height, P: weir height); the discharge coefficient and discharge rate for bed slope and convergence angle case were 19.22%, 23.9% and 22.28%, 25.91% higher than for a conventional labyrinth weir in prismatic channel, respectively. Simultaneous application of a bed slope and convergence angle significantly increases the discharge coefficient and discharge value case were 28.64% and 30.42% higher than compared to the conventional case. Therefore, changing the bed slope and wall angle of the weir channel increases the discharge coefficient and in this type of weir and these design alterations should be considered in weir design.
Keywords : Labyrinth Weirs, Channel Bottom slope, Converging channel, Discharge Coefficient, FLOW 3D