Experimental Studies of flow from Flap Gate in circular open channel at free flow condition

Document Type : Research Paper

Authors

1 Department of Water Engineering, Faculty of Agriculture, Urmia university, Urmia, Iran

2 Irrigation and Reclamation Department, University of Tehran, Alborz, Iran

Abstract

Present research covers the results of a theoretical and experimental investigation on a circular and quadratic flap gate, which installed at the exit of a circular channel. This study would employ an experimental program in a horizontal channel of circular cross section of 200 and 300 mm diameters, equipped with either a circular or quadratic flap gate to explore the basic parameters affecting the flow discharge estimation of these devices. In this study, of three ways such of the first form Stage-Discharge technique, incomplete self-similarity theory and the second form Stage-Discharge technique have been used for estimating the discharge for circular and quadratic flap gate under free flow conditions. The research took the advantages the main difficulties during the experiments were the vibration of the gate as well as accurate measurement of gate opening. The use of second form Stage-Discharge technique would overcome such weaknesses. The most accurate of these methods is incomplete self-similarity theory. In this theory, mean absolute relative error for circular flap gate is equal to 3.34% and for 4.1% for quadratic flap gate.

Keywords

Main Subjects

References

Soil conservation service. (1973). Drainage of Agricultural Land. US Department of Agriculture. Pub. Water Information Center, New York.
ARMCO., Canada Ltd. (1978). Armco Water Control Gates-Catalogue. P.O. Box 3000, Guelph, Ontario, Canada.
Burrows R. and Ali K.H.M. (1997). Flow estimation from flap–gate monitoring. Journal of Institution of Water and Environmental Management (U.K.) 11(5): 346–356.
Graaff B. (1998).  Stability analysis of the Vlugter gate. The Thesis Master of Science Degree in Geosciences. The University of Technology, Faculty of Civil Engineering and Geosciences, Delft, the Netherlands.
Raemy F. and Hager W.H. (1998). Hydraulic level control by hinged flap gate. Proc. Inst. Civil Eng. Water Maritime and Energy, 130: 95–103.
Ferro V. (2000). Simultaneous flow over and under a gate. Journal of irrigation and drainage engineering.190-193.
Burt C.M., Angold R., Lehmkuhl M., and Styles S. (2001). Flap gate design for automatic upstream water level control. Journal of Irrigation and Drainage Eng. 127(2): 84–91.
Replogle J. A. and Wahlin B. T. (2003). head loss characteristics of flap Gates at the ends of drainpipes. American Society of Agricultural Engineers ISSN. 0001-2351.
Litrico X., Belaud G., Baume J.P. and Jose R.B. (2005). Hydraulic Modeling of an Automatic upstream water-level control gate. Journal of irrigation and drainage engineering. 131(2): 176-189.
Vatankhah A.R., Easa S.M. (2011). Explicit solutions for critical and normal depths in channels with different shapes. Flow Measurement and Instrumentation. 43- 49.
 
 
Iranian Journal of Soil and Water Research
Volume 49, Issue 1
March and April 2018
Pages 159-170

Files

Share

How to cite

Statistics