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.

Keywords

Triangular stepped spillway, Energy dissipation, Flow3D, Computational fluid dynamics (CFD)

Üçgen basamaklı dolusavakların enerji sönümleme performansının incelenmesi

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.

Keywords

Üçgen basamaklı dolusavak, Enerji sönümleme, Flow3D, Hesaplamalı akışkanlar dinamiği (HAD)

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