Abstract
In this study, a new design of a LOPAC gate is proposed in which the gates are designed in multiple groupings. The primary purpose of this study is to investigate the proposed structure's effective hydraulic parameters and compare them to a gate being used under the same conditions. All the simulations were modeled at three opening angles of 30°, 45°, and 60° and three flow rates of 20, 40, and 60 L/s using Flow3D software. The number of computational elements is 1,000,000, and the RNG turbulence model was used. The results showed that when using multiple LOPAC gates, the average maximum velocity decreased by about 18% compared to the single case. Moreover, the distribution range of the maximum velocity decreases when multiple rectangular LOPAC gates are used compared to the single mode. Also, energy dissipation increased by 63% with the 30° opening across all flow rates. This parameter decreased by about 18% in all flow rates for the 45° and 60° openings. Finally, findings showed that the gate discharge coefficient increased slightly by about 3% when using multiple LOPAC gates compared to the single-gate case.