THE EFFECT OF SEMI CYLINDRICAL WEIR- GATE ROTATION ON ENERGY LOSS AND DISCHARGE COEFFICIENT

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MASOUDIAN M.; SEVERI A.; ZIAEFAR S.

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Journal: Journal of Water Resources Engineering Year:2014 | Volume:7 | Issue:22 Page(s): 85-100

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Title

THE EFFECT OF SEMI CYLINDRICAL WEIR- GATE ROTATION ON ENERGY LOSS AND DISCHARGE COEFFICIENT

Author(s)

MASOUDIAN M. | SEVERI A. | ZIAEFAR S. | Issue Writer Certificate

Keywords

ROTATIONQ2

COMBINED STRUCTUREQ2

SEMI CYLINDRICAL WEIR- GATEQ2

ENERGY LOSSQ2

DISCHARGE COEFFICIENTQ2

Abstract

The combined weir- gate is a structure which may replace weir and gate in channels. The SEMI CYLINDRICAL WEIR- GATE has a higher DISCHARGE COEFFICIENT in comparison with the sharp crested weir- gate because of the curvature on the weir section which the water wedge adheres momentarily. In a weir- gate structure, the rate of the passing flow discharging above the weir and through the gate depends on the structure's position. In the present research, hydraulics of the SEMI CYLINDRICAL WEIR- GATE rotating the flow around the off-center axis, so that the gate opening height remains constant were investigated. The experiments were conducted in a rectangular' and horizontal flume with the length of 5 m and width of 75 mm in the Sari Agricultural Sciences and Natural Resources University Hydraulics laboratory. PVC pipes with 40, 50, 60, 70 and 85 mm diameters were used as semi cylindrical structures. Experimental results illustrate that the maximum and minimum DISCHARGE COEFFICIENT were observed in the 330 and 90 degree angels, respectively. Furthermore, the maximum and minimum ENERGY LOSS were observed for the 90 and 180 degree angels. Moreover, the results show that in addition to the angle of the semi cylindrical curvature toward the horizontal line, the structure diameter affected the DISCHARGE COEFFICIENT and ENERGY LOSS. In addition, the best relationship for estimating the flow discharge is proposed.

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APA: Copy

MASOUDIAN, M., SEVERI, A., & ZIAEFAR, S.. (2014). THE EFFECT OF SEMI CYLINDRICAL WEIR- GATE ROTATION ON ENERGY LOSS AND DISCHARGE COEFFICIENT. WATER ENGINEERING, 7(22), 85-100. SID. https://sid.ir/paper/169556/en

Vancouver: Copy

MASOUDIAN M., SEVERI A., ZIAEFAR S.. THE EFFECT OF SEMI CYLINDRICAL WEIR- GATE ROTATION ON ENERGY LOSS AND DISCHARGE COEFFICIENT. WATER ENGINEERING[Internet]. 2014;7(22):85-100. Available from: https://sid.ir/paper/169556/en

IEEE: Copy

M. MASOUDIAN, A. SEVERI, and S. ZIAEFAR, “THE EFFECT OF SEMI CYLINDRICAL WEIR- GATE ROTATION ON ENERGY LOSS AND DISCHARGE COEFFICIENT,” WATER ENGINEERING, vol. 7, no. 22, pp. 85–100, 2014, [Online]. Available: https://sid.ir/paper/169556/en

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