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Analysis of Energy Dissipation of Interval-Pooled Stepped Spillways
Xin Ma1,2, Jianmin Zhang1, Yaan Hu2
1State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China.
Abstract:
The water flow characteristics over an interval-pooled stepped spillway are investigated by combining the renormalization group (RNG) k-ε turbulence model with the volume of fluid (VOF) interface capture technique in the present study. The results show that the energy dissipation performance of the interval-pooled stepped spillway was generally better than that of the pooled, stepped spillways and the traditional flat-panel stepped spillway. The omega vortex intensity identification method is introduced to evaluate the energy dissipation. Due to the formation of "pseudo-weir", the energy dissipation did not increase with the growth of the pool's height. In addition, the average vortex intensity can characterize the dissipation rate to some extent.
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