Experimental and numerical study of sluice gate flow pattern with non- suppressed sill and its effect on discharge coefficient in free-flow conditions

Document Type : Research Paper

Authors

1 Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran.

2 Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

Abstract

The purpose of this study is to investigate the flow pattern and discharge coefficient of sluice gate with the non-suppressed sill in experimental and numerical conditions. For this purpose, the sill of a rectangular cube in widths of 7.5, 10, 15, and 20 cm was installed under the sluice gate. Experimental results showed that placing a non-suppressed sill under the sluice gate by creating a failure in the flow lines causes a different flow pattern compared to the without sill state. Deviation of streamlines after colliding with the sill causes the formation of V-shaped currents. The discretization of equations for simulations were performed using VOF method. After selecting a cell with a size of 0.07 cm as the optimal cell, the RNG turbulence model was used. The results of the numerical simulation showed an acceptable agreement with the experimental results. Thus, the place of formation of V-shaped currents was transferred downstream of the sluice gate by increasing the width of the sill and the inflow discharge. The results of the study of the discharge coefficient showed that the placement of the sill with a width of 7.5 and 20 cm, increased the discharge coefficient by an average of 5.3% and 15.5% in the experimental model and 4.7% and 16% in the numerical simulation. This relationship is without sill state and with sill state with root mean square error of 0.967 and 0.968, respectively, estimated the discharge coefficient of the sluice gate.

Keywords

References

  1. Henry H. R, (1950). Discussion on Diffusion of Submerged Jets, by Albertson, M. L. et al., Trans. Am. Society Civil Engrs, 115: 687.
  2. Rajaratnam N, Subramanya K, (1967). Flow Equation for the Sluice Gate. Journal of the Irrigation and Drainage Division, 93(3): 167-186
  3. Swamee PK, (1992). Sluice Gate Discharge Equations. Journal of Irrigation and Drainage Engineering, 118(1): 56-60.
  4. Hager WH, (1999). Underflow of Standard Sluice Gate. Experiments in Fluids 27(4): 339- 350. Doi: 10.1007/s003480050358.
  5. Ferro V, (2000). Simultaneous flow over and under a gate. Journal of irrigation and drainage engineering 126(3): 190-193
  6. Lin C.H, Yen J.F, Tsai C.T, (2002). Influence of sluice gate contraction coefficient on distinguishing condition. J. Irrigation and Drainage Eng., 128(4): 249–252
  7. V.A, Prakash Shesha N.M, (2005). Inclined sluice gate for flow measurement. J. Hydraulic Engineering, 11(1), 46-56.
  8. Akoz M, Kirkgoz M, Oner A, (2009). Experimental and Numerical Modeling of a Sluice Gate Flow. J. Hydraul. Res., 47(2): 167-176.
  9. Mohammed A, Moayed K, (2013). Gate Lip Hydraulics under Sluice gate. Modern Instrumentation. 2(1): 16-19. Doi: 10.4236/mi.2013.21003.
  10. Daneshfaraz R, Ghahramanzadeh A, Ghaderi A, Joudi AR, Abraham J, (2016). Investigation of the Effect of Edge Shape on Characteristics of Flow under Vertical Gates. Journal of American Water Works Association, Doi.org/10.5942/jawwa.2016.108.0102.
  11. Karami S, Heidari M. M, Adib Rad M. H, (2020). Investigation of Free Flow under the Sluice Gate with the Sill Using Flow-3D Model. J. Iran Sci Technol Trans Civ Eng., 44, 317–324, Doi: 10.1007/s40996-019-0031.
  12. Ghorbani M. A, Salmasi F, Saggi M. K, Norouzi R, (2020). Deep learning under H20 framework: A novel approach for quantitative analysis of discharge coefficient in sluice gates. J. Hydroinformatics. 22(6), 1603-1619.
  13. Salmasi F, Nouri M, Sihag P, Abraham J, (2021). Application of SVM, ANN, GRNN, RF, GP and RT Models For Predicting Discharge Coefficients of Oblique Sluice Gates Using Experimental Data. J. Water Supply. 21 (1): 232-248.
  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. doi: 10.22055/jhs.2022.39208.1196.
  15. Salmasi F, Norouzi R, (2020). Investigation of different geometric shapes of sills on the discharge coefficient of a vertical sluice gate. J. Amirkabir Civil Engineering. 5(2), 1-3.
  16. Daneshfaraz R, Norouzi R, Ebadzadeh P, Abbaszadeh H, (2021). Numerical investigation on effective parameters on hydraulic flows in a sluice gate with sill on free-flow condition. J. Environment and Water Engineering. doi: 10.22034/jewe.2021.295538.1596.

Files

Share

How to cite

Statistics