Numerical Investigation of Successive Sluice Gates Performance in Regulating Flow Rate in Channels

Öz

Successive sluice gates are designed to maintain a stable discharge rate in open channels despite variations in upstream water levels. This study numerically investigates the hydraulic performance of successive sluice gates under different operational conditions. Four gate configurations and five upstream flow depths were simulated to analyze their flow regulation efficiency. The numerical results were validated against experimental data, revealing differences in outlet discharge of less than 10%, indicating that the simulation model provides reliable accuracy. Following model validation, the computed outflow rates for each configuration were compared with the corresponding design discharge, showing an average deviation of approximately 8% in all tested cases. These results confirm that successive sluice gates are capable of maintaining a nearly constant flow rate, even under fluctuating upstream water levels. Moreover, energy dissipation analysis showed that losses were negligible when only the first gate was active. However, as the upstream depth increased and additional gates were engaged, energy dissipation rose to about 15–22%. Overall, the findings demonstrate that successive sluice gate systems can effectively combine precise flow regulation with adequate energy dissipation, making them suitable for hydraulic structures requiring stable discharge control under variable inflow conditions.

Anahtar Kelimeler

• Energy dissipation
• FLOW-3D software
• Input flow depth
• Output flow rate
• Successive sluice gates.

Kaynakça

1. [1] Danesfaraz R. and Ghaderi A., 2017. Numerical simulation of flow around bridge pier in clear water condition. Journal of Modeling in Engineering. 15(48): 15-26. (In persian)
2. [2] Rajaratnam N. and Subramanya K., 1967. Flow equation for the sluice gate. Journal of the Hydraulics Division. 93(4): 167-176.
3. [3] Larsen A.P. and Mishra P.K., 1990. Constant discharge device for field irrigation. Journal of Hydraulic Research. 28(4): 481-489.
4. [4] Mishra P.K., Larsen P. and Satyanarayana T., 1990. Development of low-discharge baffle-sluice modules. Journal of Irrigation and Drainage Engineering. 116(3): 444-453.
5. [5] Anwar H.O., 1999. Discharge characteristics of a multi-baffle module. Journal of Hydraulic Research. 37(2): 203-214.
6. [6] Swamee P.K., 1992. Sluice gate discharge equation. Journal of Irrigation and Drainage Engineering. 118(1): 56-60.
7. [7] Bijan Khan M., Kouchakzadeh S. and Yarizadeh H., 2010. Hydraulic design of modules with minimum sensitivity. Journal of Hydraulic Engineering. 4(4): 1-12. (In persian)
8. [8] Yarizadeh H. and Kouchakzadeh S., 2011. The effect of floating materials on the hydraulic performance of the module. Journal of Water and Soil. 25(2): 242-251. (In persian)

9. [9] Barghi Khosrow M., Bijan Khan M. and Kouchakzadeh S., 2016. Estimation of discharge coefficient of sluice gate under free and submerged flow conditions using energy equation. Journal of Hydraulics. 11(1): 113-126. (In persian)
10. [10] Mehrzad M., Kouchakzadeh S. and Bijankhan M., 2014. Design criteria for parallel baffle modules. Journal of Hydraulics. 9(2): 37-51. (In persian)
11. [11] Gül, E., Kılıç, Z., İkincioğulları, E., & Aydın, M. C. (2024). Investigation of the effect of variable-sized energy dissipating blocks on sluice gate performance. Water SA, 50(1), 92-105.
12. [12] Aydın, M. C., & Ulu, A. E. (2017). Numerical modelling of sluice gates with different sill types under submerged flow conditions. Bitlis Eren University Journal of Science and Technology, 7(1), 1-6.
13. [13] Kim D.G., 2007. Numerical analysis of free flow past a sluice gate. KSCE Journal of Civil Engineering 11(2): 127-132.
14. [14] Helmi A.M. and El-Gamal M.H., 2011. Experimental and numerical investigations of flow through free double baffled gates. Water SA. 37(2): 245-254.
15. [15] Ashkan, F., Daneshfaraz, R., Ghaffarinik, A., Gahramanzadeh, A. and Minaei, O. (2019). Numerical Investigation of the Successive Sluice Gates Performance in Regulating Flow Rate through Channels Using Flow-3D Software. Water and Soil Science, 29(4), 85-96.
16. [16] Daneshfaraz, R., Norouzi, R. and Ebadzadeh, P. 2023. Evaluation Effect of Changing the Sill Geometries and Positions on Discharge Coefficient of Vertical Sluice Gate. Journal of Civil and Environmental Engineering, 53(112), 117-127. doi: 10.22034/jcee.2022.52525.2167
17. [17] Daneshfaraz, R., Norouzi, R., Akhondi, B., Süme, V., Marangoz, O.G. and Yılmaz, E. 2025. Experimental investigation of the effect of perforated sill and orifice on sluice gate discharge coefficient. Water Science. 39(1): 426-434. doi.org/10.1080/23570008 .2025.2574772
18. [18] Daneshfaraz, R., Norouzi, R., Akhondi, B. and Djahanghiri, M., 2025. An Experiment on the Effect of Sills with Orifices Under a Sluice Gate on Energy Dissipation and Hydraulic Jump. Journal of Hydraulic Structures, 11(4), 68-78. doi: 10.22055/jhs.2025.48970.1336
19. [19] Ebadzadeh, P., Daneshfaraz, R., Nourani, B. and Abraham, J., 2025. Estimating discharge coefficient of the sluice gate including, the semi-cylindrical sill utilizing multiple model strategy. Flow measurement and instrumentation. 104-102849. doi.org/10.1016/j.flowmeasinst. 2025.102849
20. [20] Abbaszadeh, H., Norouzi, R., Sume, V., Kuriqi, A., Daneshfaraz, R., and Abraham, J. (2023). Sill Role Effect on the Flow Characteristics (Experimental and Regression Model Analytical). Fluids, 8(8), 235. https://doi.org/10.3390/fluids8080235