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Luo Y.-Q.,Yunnan University | Luo Y.-Q.,Hydrochina Kunming Engineering Corporation | Diao M.-J.,State Key Hydraulics Laboratory of Hydraulics and Mountain River Engineering | He D.-M.,Yunnan University | Bai S.-X.,Hydrochina Kunming Engineering Corporation
Shuikexue Jinzhan/Advances in Water Science

The aeration problem in spillway tunnels has attracted much attention in hydropower projects. A hydrodynamic model study of aeration devices is conducted for the 3 # spillway tunnel of Xiluodu Power Station. The study uses a 3-D numerical model and a segmentation algorithm to simulate the flow field in the tunnel. The result shows that the simulation agrees well with the experimental data from a large-scale physical model test. The layout and design of spillway aeration devices, and the clearance between the water surface and the top of the tunnel are proven to be reasonably arranged for the 3 # spillway tunnel according to the model simulations. The simulation proves the complicate nature of hydraulic regime in the ogee section. The emphasis should be on the design of the ogee section and its construction. The use of segmentation algorithms can improve the computational efficiency of high-speed flow simulation with presence of large velocity gradients. Source

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