Experimental Study of Discharge Coefficient of U-Shaped Sluice Gate under Free and Submerged Flow Conditions

Document Type : Original Article

Authors

1 Graduate of Water Structures, Faculty of Agricultural, Shahrood University of Technology, Shahrood, Iran.

2 Assistant Professor, Department of Water and Soil, Faculty of Agricultural, Shahrood University of Technology, Shahrood, Iran.

Abstract

Sluice gates are among the flow control structures that are used to measure and control the flow in water conveyance channels. In this research, the geometrical and hydraulic parameters affecting the discharge coefficient of the sluice gate (U-shaped) have been investigated experimentally. The results showed that in the free flow condition, for a constant flow rate, the upstream depth increases with the decrease of the gate opening. Also, with the increase of gate opening, the gate discharge coefficient decreased. For different inlet flow rates, the range of Froude number changes, was from 0.02 to 0.5, which caused the reduction of gate discharge coefficient by about 50%. The results of submerged flow conditions showed that the discharge coefficient increased with the increase of y1/b ratio. For the range of y1/b changes from 0.5 to 3, the value of the gate discharge coefficient for different flow rates changed from 0.35 to 0.7. Also, an increase in the upstream Froude number leads to a decrease in the gate discharge coefficient. According to the results, with the increase of y3/b, for three slopes of zero, 0.4 and 0.8%, the change trend of Cd was increasing and was in the range of 0.55 to 0.65. For gate opening of 3 cm and flow rates of 3, 6, and 9 m3/hr, the gate discharge coefficient was obtained 0.57, 0.59, and 0.61, respectively. The slope of the channel bed had no effect on the discharge coefficient of the gate in both free and submerged flow conditions.

Keywords

References

Abdelhaleem, F.S.F., 2017. Hydraulics of submerged radial gates with a sill. ISH Journal of Hydraulic Engineering, 23(2), pp. 177-186.
Aydin, M.C., and 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), pp. 1-6.
Azamathulla, H.M., Ahmad, Z., and Ab. Ghani, A., 2013. computation of discharge through side sluice gate using gene‐expression programming. Irrigation and Drainage, 62(1), pp. 115-119.
Cassan, L., and Belaud, G., 2012. Experimental and numerical investigation of flow under sluice gates. Journal of Hydraulic Engineering, 138(4), pp. 367-373.
Clemmens, A., Strelkoff, T., and Replogle, J., 2003. Calibration of submerged radial gates. Journal of Hydraulic Engineering, 129(9), pp. 680-687.
Daneshfaraz, R., Ghahramanzadeh, A., Ghaderi, A., Joudi, A.R., and Abraham, J., 2016. Investigation of the effect of edge shape on characteristics of flow under vertical gates. Journal‐American Water Works Association, 108(8), pp. E425-E432.
Emamgholizadeh, S., and Assare, K., 2008. Investigation of the upstream and downstream slope of the long-throated flumes on the discharge coefficient. Asian Journal of Engineering and Applied Sciences, Research Publishing Network (ARPN), 3(2), pp. 62-70.
Golmohammadi, M.H., and Beyram, M.K.I., 2011. Estimation of discharge for free flow under sluice and radial gates. Journal of Water and Wastewater; Ab va Fazilab (in persian), 22(2), pp. 94-101.
Habibzadeh, A., Vatankhah, A.R., and Rajaratnam, N., 2011. Role of energy loss on discharge characteristics of sluice gates. Journal of Hydraulic engineering, 137(9), pp. 1079-1084.
Heidari, M.M., Karami, S., and Adibrad, M.H., 2020. Investigation of free flow under the radial gate with the sill. Journal of Civil and Environmental Engineering, 50(100), pp. 9-19.
Henry, H., 1950. Discussion of Diffusion of submerged jets, Transaction, ASCE, pp. 687-694.
Khalili Shayan, H., and Farhoudi, J., 2013. Effective parameters for calculating discharge coefficient of sluice gates. Flow Measurement and Instrumentation, 33, pp. 96-105.
Kianmehr, H., Khodashenas, S.R., and Rostami, M., 2020. Analysis of sharp-crested rectangular side sluice gates in sub-critical flow regimes, based on spatial variable flow theory and sluice gate discharge equation. Irrigation and drainage structures engineering research, 20(77), pp. 17-38.
Kubrak, E., Kubrak, J., Kiczko, A., and Kubrak, M., 2020. Flow measurements using a sluice gate; analysis of applicability. Water, 12(3), pp. 819.
Naghaei, R., and Monem, M., 2016. Development of a mathematical model of Lopac gates in accordance with the ICSS hydrodynamic model. Journal of Irrigation and Drainage Engineering, 142(10), pp. 04016043.
Oskuyi, N.N., and Salmasi, F., 2012. Vertical sluice gate discharge coefficient. Journal of Civil Engineering and Urbanism, 2(3), pp. 108-114.
Parsaie, A., Azamathulla, H.M., and Haghiabi, A.H., 2018. Prediction of discharge coefficient of cylindrical weir–gate using GMDH-PSO. ISH Journal of Hydraulic Engineering, 24(2), pp. 116-123.
Parsaie, A., Haghiabi, A.H., Emamgholizadeh, S., and Azamathulla, H.M., 2019. Prediction of discharge coefficient of combined weir-gate using ANN, ANFIS and SVM. International Journal of Hydrology Science and Technology, 9(4), pp. 412-430.
Rajaratnam, N., and Subramanya, K., 1967. Flow equation for the sluice gate. Journal of the Irrigation and Drainage Division, 93(3), pp. 167-186.
Salmasi, F., and Norouzi Sarkarabad, R., 2020. Investigation of different geometric shapes of sills on discharge coefficient of vertical sluice gate. Amirkabir Journal of Civil Engineering, 52(1), pp. 21-36.
Silva, C.O., and Rijo, M., 2017. Flow rate measurements under sluice gates. Journal of Irrigation and Drainage Engineering, 143(6), pp. 06017001.
Swamee, P.K., 1992. Sluice-gate discharge equations. Journal of Irrigation and Drainage Engineering, 118(1), pp. 56-60.
Wahl, T.L., 2004. Issues and problems with calibration of canal gates. Critical Transitions In Water And Environmental Resources Management, pp. 1-9.
Woycicki, K., 1935. The hydraulic jump on its role on discharge of sluice gates.
Journal of Hydraulic and Water Engineering
Volume 1, Issue 1
July 2023
Pages 1-17

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