Energy Dissipation in Stepped Spillways with Different Horizontal Face Angles

Yongqin Peng, Xujin Zhang, Hao Yuan, Xia Li, Chunhang Xie, Shuqing Yang and Zhaoliang Bai
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Yongqin Peng: Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Xujin Zhang: Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Hao Yuan: Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Xia Li: Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Chunhang Xie: Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Shuqing Yang: Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China
Zhaoliang Bai: State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China

Energies, 2019, vol. 12, issue 23, 1-11

Abstract: Energy dissipation is one of the most important factors in choosing stepped spillways. However, very few studies have investigated energy dissipation with different horizontal face angles. In this paper, the realizable k - ε turbulent model was used to study the flow field, energy dissipation rates and turbulent kinetic energy and its dissipation rate for different stepped spillways with five horizontal face angles in the skimming flow regions. Results showed that the field and direction of the flow were changed by the horizontal face angles of the stepped spillway, which produced some unique characteristics and thus caused better energy dissipation. The fluctuation of free water surface will be larger with increasing horizontal face angles and the energy dissipation rate decreases with an increasing unit discharge and increases for the enlargement of the horizontal face angles. This conclusion could provide a reference for the relevant research of V shaped stepped spillways.

Keywords: numerical simulation; horizontal face angle; energy dissipation rates; stepped spillway (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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