Al-Rahhawi, G., A. Hayawi, G. (2023). The Effect of Screen Walls’ Properties on Scour Downstream Sluice Gate. Alustath, 28(2), 186-198. doi: 10.33899/rengj.2023.138602.1237
Ghufran Faris Al-Rahhawi; Ghania A. A. Hayawi. "The Effect of Screen Walls’ Properties on Scour Downstream Sluice Gate". Alustath, 28, 2, 2023, 186-198. doi: 10.33899/rengj.2023.138602.1237
Al-Rahhawi, G., A. Hayawi, G. (2023). 'The Effect of Screen Walls’ Properties on Scour Downstream Sluice Gate', Alustath, 28(2), pp. 186-198. doi: 10.33899/rengj.2023.138602.1237
Al-Rahhawi, G., A. Hayawi, G. The Effect of Screen Walls’ Properties on Scour Downstream Sluice Gate. Alustath, 2023; 28(2): 186-198. doi: 10.33899/rengj.2023.138602.1237

The Effect of Screen Walls’ Properties on Scour Downstream Sluice Gate

Al-Rafidain Engineering Journal (AREJ)
Volume 28, Issue 2, September 2023, Pages 186-198    PDF (916 K)
Document Type: Research Paper
DOI: 10.33899/rengj.2023.138602.1237
Authors
Ghufran Faris Al-Rahhawi* 1; Ghania A. A. Hayawi2
1Petrolume and Refining Engineering Department, College of engineering, University of Mosul, Mosul, Iraq
2Dams and Water Resource Engineering Department, College of engineering, University of Mosul, Mosul, Iraq
Abstract
Erosion is defined as the displacement of the bottom materials due to the flow energy and moving them to the farthest distance, which negatively affects the stability of the hydraulic structures. In this research, the effect of the properties of the screen walls on scour in open channels was studied. Therefore, the study included evaluating the effect of the diameters of the screen walls openings (φ), wall thickness (t), and the ratio of the distance of the screen walls from the gate to the height of the opening below the gate on the scour process. A total of 140 experiments were conducted in concrete channel including one size of gravel, two opening heights (4 and 5 cm) at the bottom of the gate, three diameters of the screen wall openings (0.8, 1.2 and 1.6) cm, two thicknesses of the screen wall (0.4 and 0.8) cm, one value of screen wall porosity (40%), using five discharges in the range of (50.06-27.98) l/sec when x=40d, 45d, and in the range of (44.8-23.68) l/sec when x=50d, 56.25d. The results showed that the screen walls with a diameter of (1.2) cm resulted in the lowest volume of the scour hole while experiments conducted without screen walls led to largest volume of scour hole. Moreover, the screen walls of (0.8) cm thickness leads to less volume of the scour hole as compared to those for the screen walls of (0.4) cm, especially for high discharge i.e. for high values of Fr number. Two empirical relations were proposed to compute the scour depth ratio and its length in term of dimensionless variables using dimension analysis.
Keywords
Eenergy dissipation; screen wall; scour
References
  1. -Y. Chen and Y.-H. Hong, “Characterisitics of check dam scour hole by free over‐fall flow,” Journal of the Chinese Institute of Engineers, vol. 24, no. 6, pp. 673–680, Sep. 2001, doi: 10.1080/02533839.2001.9670664.
  2. Chatterjee and S. Ghosh, “Submerged Horizontal Jet over Erodible Bed,” Journal of the Hydraulics Division, vol. 106, no. 11, pp. 1765–1782, Nov. 1980, doi: 10.1061/jyceaj.0005556.
  3. I. Othman, “Scour downstream an Ogee spillway,” AL Rafdain Engineering Journal, vol. 16, no. 3, pp. 143–155, Jul. 2008, doi: 10.33899/rengj.2008.44680.
  4. C. Carriaga, “Scour Evaluation Program for Toe-Down Depth Assessment,” Scour Evaluation Program for Toe-Down Depth Assessment, Sep. 2000, doi: 10.1061/40517(2000)334.
  5. A. Yousif et al., “Open Channel Sluice Gate Scouring Parameters Prediction: Different scenarios of dimensional and Non-Dimensional input parameters,” Water, vol. 11, no. 2, p. 353, Feb. 2019, doi: 10.3390/w11020353.
  6. K. M. Alhealy and G. A. A. M. Hayawi, “Experimental study of the scour depth at downstream weirs has different holes,” AL Rafdain Engineering Journal, vol. 24, no. 1, pp. 18–23, Oct. 2019, doi: 10.33899/rengj.2019.163111.
  7. A. Gelmiran, K. I. Othman, and M. Günal, “Investigation of Local Scour Around Group Bridge Pier with Different Shapes,” AL Rafdain Engineering Journal, vol. 24, no. 2, pp. 10–22, Dec. 2019, doi: 10.33899/rengj.2019.164355.
  8. I. Alsaidi, G. A. A.-M. Hayawi, and M. Alsawaf, “Study of Scour Around Cylindrical Bridge Piers with Circular Openings,” AL Rafdain Engineering Journal, vol. 25, no. 2, pp. 66–74, Dec. 2020, doi: 10.33899/rengj.2020.126863.1029.
  9. Raeisi and M. Ghomeshi, “Effect of bridge pier diameter on maximum depth of scour impacts on the environment,” SN Applied Sciences, vol. 2, no. 11, Oct. 2020, doi: 10.1007/s42452-020-03565-6.
  10. A. Al-Hafidh, T. A. Gelmiran, and S. Jasim, “Experimental investigation of erosion downstream culverts,” Proceedings of the 39th IAHR World Congress, Jan. 2022, doi: 10.3850/iahr-39wc2521711920221218.
  11. H. Yeh, “Free‐Surface Flow Through Screen,” Journal of Hydraulic Engineering, Oct. 1989, doi: 10.1061/(ASCE)0733-9429(1989)115:10(1371).
  12. Rajaratnam, “Screen-Type Energy Dissipator for Hydraulic Structures,” Journal of Hydraulic Engineering, Apr. 2000, doi: 10.1061/(ASCE)0733-9429(2000)126:4(310).
  13. Balkış, “Experimental investigation of energy dissipation through inclined screens,” MSc Dissertation, Dept. of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey , 2004.
  14. Aslankara, “Experimental investigation of tailwater effect on the energy dissipation through screens”, MSc dissertation, Dept. of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey, 2007.
  15. A. Mahmoud, “Laboratory Study of Energy Dissipation Using Screen Walls, ”  MSc dissertation, Dept. of Civil Engineering, University of Duhok, Duhok, Iraq, (2010). 
  16. F. A. Rahhawi, “Laboratory study of scour  Behind the screen walls used for energy dissipation, ” MSc dissertation, Dept. of Water Resources Engineering, University of Mosul, Mosul, Iraq, (2011).
  17. Zayed, A. E. Molla, and M. Sallah, “An experimental investigation of head loss through a triangular ‘V- shaped’ screen,” Journal of Advanced Research, vol. 10, pp. 69–76, Mar. 2018, doi: 10.1016/j.jare.2017.12.005.
  18. Zayed, A. E. Molla, and M. Sallah, “Experimental investigation of curved trash screens,” Journal of Irrigation and Drainage Engineering-asce, vol. 146, no. 6, Jun. 2020, doi: 10.1061/(asce)ir.1943-4774.0001472.
  19. Çakır, “Experimental investigation of energy dissipation through screens,” MSc dissertation, Dept. of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey, 2003.
Statistics
Article View: 185
PDF Download: 132


Journal Management System. Powered by ejournalplus.com