The Effect of Various Energy Dissipator Layouts on Energy Dissipating Along the Stilling Basin

Yıl 2023, Cilt: 18 Sayı: 4, 145 - 153, 30.12.2023

Şerife Yurdagül Kumcu Kamil İspir

Öz

Energy dissipater in the stilling basin is a structure designed to protect downstream of the spillway from erosion and scour by reducing flow energy in the energy dissipation pool. Energy dissipation pool is an important element of hydraulic structures as a transition between the high-velocity flow and the sensitive tail water. The aim of this study is to investigate the energy dissipation ratios of baffle blocks which constructed in Type III stilling basin by using physical and numerical modeling methods. Energy dissipation ratio of the baffle blocks were determined in 3 different layouts as single row, two rows and two rows without end sill are tested. In addition, these experimental studies were tested by numerical study. Results show that, extra added chute blocks help to increase energy dissipating ratio at the energy dissipating pool and so the stilling basin length shortens by shortening the length of the hydraulic jump. The physical study results and the data obtained from numerical modelling are also similar to each other.

Anahtar Kelimeler

Open channel hydraulics, Spillway structures, Stilling basins, Energy dissipation block, Energy dissipaters, FLOW-3D, Hydraulic Jump

Teşekkür

The authors are grateful and would like to thanks Dr. Alpaslan YARAR and Dr. Ali YILDIZ, who provided their assistance throughout the work.

Kaynakça

• Amorim JCC, Amante, RCR, Barbosa VD, (2015) Experimental and Numerical Modelling of Flow in A Stilling Basin. in E-proceedings of the 36th IAHR World Congress. 1-6, Hague, Netherlands, 1-7. https://toc.proceedings.com/30674webtoc.pdf
• Bradley JN, Peterka AJ, (1957) Hydraulic Design of Stilling Basins: Hydraulic Jumps on a Horizontal Apron (Basin I). Journal of the Hydraulics Division, 83(5), 1401–1. [online] https://ascelibrary.org/doi/abs/10.1061/JYCEAJ.0000126 (Accessed April 26, 2022).
• Cook, C., Richmond, M. C., Serkowski, J. A., and Ebner, L. L. (2002) “Free-Surface Computational Fluid Dynamics Modeling of a Spillway and Tailrace: Case Study of the Dalles Project” in Hydrovision 2002. United States.
• Dermawan, V., Suhardjono, Prasetyorini, L. and Anam S. (2021) “Hydraulic Model Experiment of Energy Dissipation on thr Horizontal and USBR II Stilling Basin” IOP Conferences, Earth and Envirenmental Science, 930 (012029). https://iopscience.iop.org/article/10.1088/1755-1315/930/1/012029
• Hager WH,. (1992) Energy Dissipators and Hydraulic Jump, Dordrecht, Springer Netherlands. [online] http://link.springer.com/10.1007/978-94-015-8048-9 (Accessed April 26, 2022).
• Kumcu SY, Kökpınar MA, (2019) Applıcatıon Of Numerıcal Modelling On Spillway Structures: A Case Study Of Kavsak Bendi Hydroelectrıc Power Plant (HEPP)” DSI Technical Bulletin, 132, 12-27.
• Nigam U, Das S, Choudhury MR, (2016) Overview of Energy Dissipators and Stilling Basins with Design Aspect of Hydraulic Jump Type Energy Dissipators. NCIET2015, 1-9. https://www.academia.edu/74545483/Overview_Of_Energy_Dissipators_And_Stilling_Basins_With_Design_Aspects_Of_Hydraulic_Jump_Type_Energy_Dissipators_M_R_Choudhury
• Pagliara, S. and Palermo, M. (2012) Effect of Stilling Basin Geometry on the Dissipative Process in the Presence of Block Ramps. Journal of Irrigation and Drainage Engineering, 138(11), 1027–1031. [online]https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29IR.1943-4774.0000505 (Accessed April 26, 2022).
• Peterka AJ, (1984) Hydraulic Design of Stilling Basins and Energy Dissipators, Denver, Colorado, United States Department of the Interior Bureau of Reclamation. https://luk.staff.ugm.ac.id/USBR/EM25.pdf