Journal of New Approaches in Water Engineering and Environment
Scientific Journal

Laboratory Study of Energy Losses in Simple and Toothed Triangular Spillway

Document Type : Original Article

Authors

Mohammad Ali Namavi Zadeh 1
Aslan Egdernezhad 2
Ali Reza Masjedi 3

1 M.Sc. Student, Department of Water Sciences and Engineering,, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.

2 Assistant professor, Department of Water Sciences and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.

3 Associate professor, Department of Water Sciences and Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.

https://doi.org/10.22034/nawee.2023.395536.1041
Abstract
In this study, experiments were performed to investigate the relative energy losses in two models of simple triangular and toothed overflow made of fiberglass in four different landings at three depths of 100%, 90%, and 80%. The effective variables in this study were the landing number and the bottom depth at the end of the hydraulic jump. The results of this study showed that at three downstream depths, energy losses decrease with increasing landing number. Also, energy losses in the free projectile mode are higher than in the other two modes due to the full development of the hydraulic jump. In the general comparison mode, the performance of a toothed triangular overflow is better in energy dissipation than in the toothed mode, due to the fracture and compression of the flow lines in contact with the teeth at the end of the overflow projectile. In general, the use of teeth at the end of the overflow projectile causes energy loss in the conditions of 100% of the bottom depth in the toothed triangular overflow compared to the simple triangular overflow by an average of 7%, and in the conditions of 90% and 80% of the bottom depth by about 8% and 10%, respectively.

Keywords

Triangular overflow
Bottom depth
Energy dissipation
Indentation
Abbasi Parvin Y., Barani Gh.A. 2009. Energy consumption in hydraulic structures (field study of energy consuming structures). Jihad University Publications (Amir Kabir University of Technology).
An Experimental Study of the Effect of Barrier with Trapezoidal and Triangular Slots in a Flip Bucket Jet on Downstream Scour Using a Physical Model
Balloffet A. 1961. Pressures on spillway flip buckets. Journal of the Hydraulics Division, 87(5), pp.87-98.
Chen T.C., Yu Y.S. 1965. Pressure distributions on spillway flip buckets. Journal of the Hydraulics Division, 91(2), pp.51-63.
Eskandari A., Heidarnejad M., Masjedi A., Purmohammadi M.H., Kamanbedast A. 2020. Experimental investigation on the effect of different slot shapes and configurations on scour dimension downstream of flip buckets. Water SA, 46(3), pp.458-464.
Eskandari A., Heidarnejad M.,  Masjedi A., Pourmahammadi M.H., Kamanbedast A.A. 2019. The experimental study of the effect of the geometry of the downstream flip bucket on the scouring of its tail water. Water Resources Engineering, 42(12), pp.65-77. (In Persian)
Juon R., Hager W.H. 2000. Flip Bucket Without and With Deflectors. Journal of Hydraulic Engineering, 126(11), pp.837-845.
Lenau C.W., Cassidy J.J. 1969. Flow through spillway flip bucket. Journal of Hydraulic Division, ASCE. 95(5), pp.633–648.
Mason P.J. 1993. Practical guidelines for the design of flip buckets and plunge pools. International water power and dam construction, 45(9-10), pp.40-45.
Mehri M. 2015. Simulation of the hydraulic behavior of water flow on the Balaroud Dam spillway using a physical model using a small-scale, Master's thesis, Shahid Chamran University of Ahvaz.
Omidvarinia M., Mousavijahromi S.h. 2014. Comparative Analysis of energy Losses in the Traditional and Triangular Flip Buckets. Journal of Irrigation Sciences and Engineering (JISE), 37(1), pp.133-142. (In Persian)
Safarinejadi G., Heidarnejad M., Bordbar A., Pourmohammadi M.H., Kamanbedast A., 2019. An Experimental Study of the Effect of Barrier with Trapezoidal and Triangular Slots in a Flip Bucket Jet on Downstream Scour Using a Physical Model. Journal of Water and Soil Science (Science and Technology of Agriculture and Natural Resources), Special Issue of Flood and Soil Erosion, Isfahan University of Technology, Isfahan, Iran, 23(4), pp.243-254.
Steiner R., Heller V., Hager W.H., Minor H.E. 2008. Deflector ski jump hydraulics. Journal of Hydraulic Engineering, 134(5), pp.562-571.
Tierney D.G., Henderson F.M. 1963. Flow at the toe of a spill way. La Houille Blanche, Grenoble, France, 18(1), pp.42-50.
Journal of New Approaches in Water Engineering and Environment
Volume 2, Issue 1
March 2023
Pages 81-92

Home

Guide for Authors

Submit Manuscript

Reviewers

Contact Us