Journal of Hydraulic Structures

Journal of Hydraulic Structures

An Experiment on the Effect of Sills with Orifices Under a Sluice Gate on Energy Dissipation and Hydraulic Jump

Document Type : Research Paper

Authors
Rasoul Daneshfaraz 1
Reza Norouzi 1
Behnaz Akhondi 1
Mehdi Djahanghiri 2
1 Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, East Azerbaijan Iran.
2 Department of Mathematics, Faculty of Basic Sciences, University of Maragheh, Maragheh, Iran.
10.22055/jhs.2025.48970.1336
Abstract
In the present study, sill with orifice were utilized to enhance energy dissipation downstream of these structures. For this purpose, a sill with the same width as the channel, a fixed height, and 1, 2, 3, and 4 perforations with a constant diameter of 2 centimeters were experimentally investigated. The results indicated that under the presence of the sill, the specific energy and Froude number downstream of the gate decreased by more than 13% on average across all models. The introduction of sill and the increase in their number in the orifice led to increased turbulence in the flow, resulting in a reduction of specific energy downstream of the gate. A quantitative comparison of the results obtained from the specific energy downstream of the gate shows that the gate with orifice sills, with 1, 2, 3, and 4 orifices, reduces the specific energy downstream of the gate by an average of 29%, 32%, 40%, and 48%, respectively, compared to the non-orifice sill. Additionally, the non-orifice sill reduces the specific energy downstream of the gate by 14% compared to the non-sill condition. Furthermore, the analysis of depth ratios and energy dissipation in hydraulic jumps revealed that the sill with 4 orifices sill the lowest depth ratio of the jump, while a decrease in the number of orifices increased the contribution of hydraulic jump to the energy dissipation of the flow.
Keywords
Energy and depth ratio
Downstream Froude number
Vertical gate
Sill with orifice
Subjects
  1. Novak, P., Moffat, A. I. B., Nalluri, C., & Narayanan, R. A. I. B. (2017). Hydraulic structures. CRC Press.
  2. Peterka, A. J. (1978). Hydraulic design of stilling basins and energy dissipators (No. 25). Department of the Interior, Bureau of Reclamation
  3. Rajaratnam, N. (1968). Hydraulic jump on rough bed. Transaction of the Engineering Institute of Canada, 11 (A-2), 1-8.
  4. Hughes, W. C., & Flack, J. E. (1984). Hydraulic jump properties over a rough bed. Journal of Hydraulic Engineering, 110(12), 1755-1771. https://doi.org/10.1061/(ASCE)0733-9429(1984)110:12(1755)
  5. Tokyay, E. (2005). Effect of a wavy bed with relative roughness on hydraulic jump characteristics. Proceedings of the World Water and Environmental Resources Congress: Impacts of Global Climate Change, Anchorage, Alaska.
  6. Cassan, L., & Belaud, G. (2008). Rans simulation of the flow generated by sluice gates. RANS Simulation of the Flow Generated by Sluice Gates, 217-225. http://dx.doi.org/10.1400/177116
  7. Retsinis, E., Dimitriou, D., & Demetriou, J. (2011). Local Energy Change around Sluice Gate and Weir Flows within Inclined Channels. In Proceedings of the 3rd International CEMEPE & SECOTOX Conference, Skiathos.
  8. Jalil, S. A., Sarhan, S. A., & Yaseen, M. S. (2015). Hydraulic jump properties downstream a sluice gate with prismatic sill. Research Journal of Applied Sciences, Engineering and Technology, 11(4), 447-453. http://dx.doi.org/10.19026/rjaset.11.1801
  9. Abdelmonem, Y. K., Shabayek, S., & Khairy, A. O. (2018). Energy dissipation downstream sluice gate using a pendulum sill. Alexandria Engineering Journal, 57(4), 3977-3983. https://doi.org/10.1016/j.aej.2018.01.019
  10. Eltoukhy, M. A. R., & Alsaydalani, M. O. (2019). Hydraulic jump characteristics downstream of a sluice gate with an orifice. International Journal of Scientific & Engineering Research, 10(10).
  11. Abbaspour, A., Taghavianpour, T., & Arvanaghi, H. (2019). Experimental study of the hydraulic jump on reverse bed with porous screens. Applied Water Science, 9, 1-7. https://doi.org/10.1007/s13201-019-1032-7
  12. Daneshfaraz, R., MajediAsl, M., Mirzaee, R., & Tayfur, G. (2021). Hydraulic Jump in a Rough Sudden Symmetric Expansion Channel. AUT Journal of Civil Engineering, 5(2), 245-256. doi: 10.22060/ajce.2020.18227.5667
  13. Daneshfaraz, R., Norouzi, R., Ebadzadeh, P., Di Francesco, S., & Abraham, J. P. (2023). Experimental study of geometric shape and size of sill effects on the hydraulic performance of sluice gates. Water, 15(2), 314. https://doi.org/10.3390/w15020314
  14. Daneshfaraz, R., Abbaszadeh, H., Gorbanvatan, P., & Abdi, M. (2021). Application of sluice gate in different positions and its effect on hydraulic parameters in free-flow conditions. Journal of Hydraulic Structures, 7(3), 72-87. https://doi.org/10.22055/jhs.2022.39208.1196
  15. Daneshfaraz, R., Majediasl, M., & Bagherzadeh, M. (2020). Experimental analysis of inclined gabion drop behavior in comparison to the standard stilling basins (USBR). Iranian Journal of Soil and Water Research, 51(10), 2531-2541. https://doi.org/10.22059/ijswr.2020.303078.668625
  16. Daneshfaraz, R., Bagherzadeh, M., Ghaderi, A., Di Francesco, S., & Asl, M. M. (2021). Experimental investigation of gabion inclined drops as a sustainable solution for hydraulic energy loss. Ain Shams Engineering Journal, 12(4), 3451-3459. http://dx.doi.org/10.1016/j.asej.2021.03.013
  17. Daneshfaraz, R., Majedi-Asl, M., & Bagherzadeh, M. (2023). Laboratory Study and Comparison of Gabion Inclined Drop Energy Dissipation Equipped with Vertical Screens. Irrigation and Water Engineering, 13(3), 38-54. https://doi.org/10.22125/iwe.2023.168166