A standard κ-ε model,a RNG κ-ε model,a Realizable κ-ε model and a standard κ-ω model combined with VOF method which can get the free surface of water are applied to simulate the vortex flow in the flood discharging tunnel of Gongboxia Hydropower Station respectively. The validity of the calculation is verified by the prototype data,and the RNG κ-ε model is more applicable than others. Then the vortex-type tunnel and its posterior segment are simplified to a straight tunnel and the barrage is placed in diffe...
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