Numerical Simulation of Water-Filling Process in Long-Distance Diversion Tunnel with Free Flow

Wang, Xiaoling; Wang, Chenchen; An, Juan; Li, Tao

doi:10.1109/iscsct.2008.303

Cited by 4 publications

(1 citation statement)

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“…Calomino F et al [23] proposed a discharge computational model based on the integration of the velocity profile in an internally corrugated tunnel; the numerical solutions of the velocity profiles and water depths were accurate compared with the experimental value. Prior research [24,25] has substantiated the suitability of computational fluid dynamics (CFD) in predicting the hydraulic performance of water conservancy projects. Consequently, the numerical simulation method proves to be a precise and efficient alternative for estimating flow patterns and designing the structure of water conveyance tunnels.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Hydraulic Performance and Arrangement Optimization of Non-Prismatic Water Conveyance Tunnel—A Case Study of Project X

Li,

Yuan,

Zhao

et al. 2024

Water

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The water conveyance tunnel is an important hydraulic structure in water conservancy projects. Typically, it manifests as a non-prismatic tunnel due to variations in the cross-sectional geometry, which give rise to an unpredictable flow pattern that significantly impacts the secure and stable operation of the tunnel. This study takes water conservancy project X as a case and investigates the hydraulic performances of a non-prismatic water conveyance tunnel using a scale model test and numerical simulation; the hydraulic performance, such as flow pattern, discharge, flow velocity, and water depth profile are analyzed for both free flow and submerged flow conditions. The results show that the simulation data fit well with the experimental value observed in the scale model test for free flow; however, a substantial discrepancy emerges under submerged flow conditions. This discrepancy is attributable to the presence of a vacuum in the distortional plan section. Notably, the effect of water entrainment phenomena on flow rate and velocity is diminished in the scale model test, emphasizing the advantage of numerical simulation in predicting hydraulic parameters for the prototype. On this basis, the optimization of the gate shaft arrangement is executed through numerical simulation; the results indicate that the vacuum issues in the contraction section were partially resolved through structure optimization. The simulation values are close to the experimental results, and the modified design of the tunnel can be used in a water conveyance project.

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Section: Introductionmentioning

confidence: 99%