Investigation of energy dissipation performance of triangular stepped spillways
Year 2024,
Volume: 30 Issue: 4, 522 - 529, 30.08.2024
Eyyüp Ensar Yalçın
,
Erdinç İkincioğulları
,
Nihat Kaya
Abstract
Stepped spillway can dissipate most of the flow energy in the discharge channel with the steps along the discharge channel. These spillways, which have been widely used for centuries due to the contribution of the steps in energy dissipation, have been the subject of many academic studies. In this study, the energy dissipation performance of triangular stepped spillways are investigated using Flow-3D software. A total of nine analyzes were carried out using three different models and three different discharges. As a result of the analyzes carried out, it was concluded that the energy dissipation ratio increases with the increase of the step depth (ℎ𝑡), the triangular stepped spillways can dissipate up to 78% more energy than the conventional stepped spillways, and this rate decreases as the transition flow regime is passed.
References
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- [7] Ohtsu I, Yasuda Y. “Transition from supercritical to subcritical flow at an abrupt drop”. Journal of Hydraulic Research, 29(2), 309-328. 1991.
- [8] Chanson H. “Hydraulic design of stepped spillways and downstream energy dissipators”. Dam Enginering, 11(15), 205-242 2001.
- [9] Boes RM, Hager WH. “Hydraulic design of stepped spillways for RCC Dams”. Journal of Hydraulic Engineering, 129(9), 671-679, 2003.
- [10] Felder S, Guenther P, Chanson H. “Air-Water Flow Properties and Energy Dissipation on Stepped Spillways: A Physical Study of Several Pooled Stepped Configurations”. School of Civil Engineering, The University of Queensland, Brisbane, Australia, Scientific Report, CH87/12, 2012.
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- [21] Hamedi A, Hajigholizadeh M, Mansoori A. “Flow simulation and energy loss estimation in the nappe flow regime of stepped spillways with Inclined steps and end sill: A numerical approach”. Civil Engineering Journal, 2, 426-437, 2016.
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- [28] Usta E. Numerical Investigation of Hydraulic Characteristics of Laleli Dam Spillway and Comparison with Physical Model Study. MSc. Thesis, Middle East Technical University, Ankara, Turkey, 2014.
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- [30] Ghasemlouunia R. Hidrolik ve Su Kaynakları Mühendisliğinde FLOW-3D. 1. Baskı. Ankara, Türkiye, Nobel Yayınevi, 2021.
- [31] Flow Science Inc. Flow-3D User Manual. 1st ed. New Mexico, USA, Flow Science Inc., 2022.
- [32] Moghadam MK, Amini A. Moghadam E K. “Numerical study of energy dissipation and block barriers in stepped spillways”. Journal of Hydroinformatics, 23(2), 284-297, 2021.
- [33] Yalçın E.E. Basamaklı Dolusavakların Hesaplamalı Akışkanlar Dinamiği (HAD) Yöntemi ile İncelenmesi. Yüksek Lisans Tezi, Fırat Üniversitesi, Elazığ, Türkiye, 2022.
Üçgen basamaklı dolusavakların enerji sönümleme performansının incelenmesi
Year 2024,
Volume: 30 Issue: 4, 522 - 529, 30.08.2024
Eyyüp Ensar Yalçın
,
Erdinç İkincioğulları
,
Nihat Kaya
Abstract
Basamaklı dolusavaklar, tahliye kanalı boyunca bulunan basamaklarla akım enerjisinin büyük kısmını tahliye kanalında sönümleyebilmektedir. Basamakların enerji sönümlemedeki katkısı sebebiyle yüzyıllardır yaygın olarak kullanılan bu dolusavaklar, birçok akademik çalışmaya konu olmuştur. Bu çalışma kapsamında, üçgen basamaklı dolusavakların enerji sönümleme performansları Flow-3D yazılımı kullanılarak incelenmiştir. 3 farklı model ve 3 farklı debi kullanılarak toplam 9 adet analiz yürütülmüştür. Yürütülen analizler neticesinde, üçgen basamaklı dolusavaklarda basamak derinliğinin (ℎ𝑡) artışıyla birlikte enerji sönümleme oranın arttığı, üçgen basamaklı dolusavakların klasik basamaklı dolusavaklara göre yaklaşık %78’e varan oranlarda daha fazla enerji sönümleyebildiği ve bu oranın geçiş akım rejimine doğru gidildikçe azaldığı sonuçlarına varılmıştır.
References
- [1] Boes RM, Chanson H, Matos J, Ohtsu I, Yasuda Y, Takahasi M, Tatewar SP, Ramesh NI, Prakash DP, Chamani MR, Rajaratnam N. “Characteristics of skimming flow over stepped spillways”. Journal of Hydraulic Engineering, 126(11), 860-873, 2000.
- [2] Chanson H. “Hydraulics of stepped spillways: current status”. Journal of Hydraulic Engineering, 126(9), 636-637, 2000.
- [3] Murillo RE. Experimental Study of the Development Flow Region on Stepped Chutes. PhD Thesis, University of Manitoba, Winnipeg, Manitoba, Canada, 2006.
- [4] Sorensen RM. “Stepped spillway hydraulic model investigation”. Journal of Hydraulic Engineering, 111(12), 461-472, 1985.
- [5] Chanson H. “Stepped spillway flows and air entrainment”. Canadian Journal of Civil Engineering, 20(3), 422-435, 1993.
- [6] Chanson H. “Prediction of the transition nappe/skimming flow on a stepped channel”. Journal of Hydraulic Research, 34(3), 421-429, 1996.
- [7] Ohtsu I, Yasuda Y. “Transition from supercritical to subcritical flow at an abrupt drop”. Journal of Hydraulic Research, 29(2), 309-328. 1991.
- [8] Chanson H. “Hydraulic design of stepped spillways and downstream energy dissipators”. Dam Enginering, 11(15), 205-242 2001.
- [9] Boes RM, Hager WH. “Hydraulic design of stepped spillways for RCC Dams”. Journal of Hydraulic Engineering, 129(9), 671-679, 2003.
- [10] Felder S, Guenther P, Chanson H. “Air-Water Flow Properties and Energy Dissipation on Stepped Spillways: A Physical Study of Several Pooled Stepped Configurations”. School of Civil Engineering, The University of Queensland, Brisbane, Australia, Scientific Report, CH87/12, 2012.
- [11] Peyras L, Royet P, Degoutte G. “Flow and energy dissipation over stepped gabion weirs”. Journal of Hydraulic Engineering, 118(5), 707-717, 1992.
- [12] Ma P, Hu Y, Liu H. “Study on energy dissipation characteristics of skimming flow on stepped spillways”. Taiwan Water Conservany, 69(2), 89-102, 2021.
- [13] Ikinciogullari E. “Energy dissipation performance of the trapezoidal stepped spillway”. Journal of Engineering Research, 11(2A), 131-142, 2021.
- [14] Tabbara M, Chatila J, Awwad R. “Computational simulation of flow over stepped spillways”. Computers and Structures, 83(27), 2215-2224, 2005.
- [15] Ghaderi A, Abbasi S, Di Francesco S. “Numerical study on the hydraulic properties of flow over different pooled stepped spillways”. Water, 13(5), 1-25, 2021.
- [16] Saqib NU, Akbar M, Pan H, Ou G, Mohsin M, Ali A, Amin A. “Numerical analysis of pressure profiles and energy dissipation across stepped spillways having curved risers”. Applied Sciences, 12(1), 1-18 2022.
- [17] Roushangar K, Akhgar S, Shahnazi S. “The effect of triangular prismatic elements on the hydraulic performance of stepped spillways in the skimming flow regime: an experimental study and numerical modeling”. Journal of Hydroinformatics, 24(2), 243-258, 2022.
- [18] Ikinciogullari E. “Stepped spillway design for energy dissipation”. Water Supply, 23(2), 749-763, 2023,
- [19] Attarian A, Hosseini K, Abdi H, Hosseini M. “The effect of the step height on energy dissipation in stepped spillways using numerical simulation”. Arabian Journal for Science and Engineering, 39, 2587-2594, 2014.
- [20] Mohammad Rezapour Tabari M, Tavakoli S. “Effects of stepped spillway geometry on flow pattern and energy Dissipation”. Arabian Journal for Science and Engineering, 41, 1215-1224, 2016.
- [21] Hamedi A, Hajigholizadeh M, Mansoori A. “Flow simulation and energy loss estimation in the nappe flow regime of stepped spillways with Inclined steps and end sill: A numerical approach”. Civil Engineering Journal, 2, 426-437, 2016.
- [22] Irzooki RH, Mohammed JR, Ameen AS. “Computational fluid dynamics modeling of flow over stepped spillway”. Tikrit Journal of Engineering Science, 23, 1-11, 2016.
- [23] Jabbar IN. “Numerical Analysis of Flow over Stepped Spillways”. MSc. Thesis, Gaziantep University, Gaziantep, Turkey, 2018.
- [24] Salmasi F, Samadi A. “Experimental and numerical simulation of flow over stepped spillways”. Applied Water Science, 8, 1-11, 2018.
- [25] Ashoor A, Riazi A. “Stepped spillways and energy dissipation: A non-uniform step length approach”. Applied Sciences, 9, 1-17, 2019.
- [26] İkincioğulları, E. “Ters basamaklı eşikler kullanılarak tasarlanan basamaklı savakların enerji sönümleme oranlarının sayısal olarak incelenmesi”. European Journal of Science and Technology, 23, 189-196, 2021.
- [27] Mero S, Mitchell S. “Investigation of energy dissipation and flow regime over various forms of stepped spillways”. Water and Environment Journal, 31(1), 127-137, 2017.
- [28] Usta E. Numerical Investigation of Hydraulic Characteristics of Laleli Dam Spillway and Comparison with Physical Model Study. MSc. Thesis, Middle East Technical University, Ankara, Turkey, 2014.
- [29] Kocaman S. Baraj Yıkılması Problemı̇nı̇n Deneysel ve Teorı̇k Olarak İncelenmesı̇. Doktora Tezi, Çukurova Üniversitesi, Adana, Türkiye, 2007.
- [30] Ghasemlouunia R. Hidrolik ve Su Kaynakları Mühendisliğinde FLOW-3D. 1. Baskı. Ankara, Türkiye, Nobel Yayınevi, 2021.
- [31] Flow Science Inc. Flow-3D User Manual. 1st ed. New Mexico, USA, Flow Science Inc., 2022.
- [32] Moghadam MK, Amini A. Moghadam E K. “Numerical study of energy dissipation and block barriers in stepped spillways”. Journal of Hydroinformatics, 23(2), 284-297, 2021.
- [33] Yalçın E.E. Basamaklı Dolusavakların Hesaplamalı Akışkanlar Dinamiği (HAD) Yöntemi ile İncelenmesi. Yüksek Lisans Tezi, Fırat Üniversitesi, Elazığ, Türkiye, 2022.