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- W2085243350 abstract "The two-phase 1D-3D model of full load surge, presented previously by the authors, is applied to simulation of self-excited oscillations in prototype power station. The model consists in 1D hydro-acoustic equations for the penstock domain, and 3D two-phase unsteady RANS equations for turbine domain, including the cavitating flow in the draft tube. Both systems of equations are linked together by pressure and discharge at the penstock-turbine interface and solved simultaneously. To demonstrate the work of the model over-load pressure pulsations are simulated for high head prototype power plant. The influence of numerical parameters is investigated. It was shown that the choice of cavitation model has a strong effect on the amplitude of pulsations. The structure of the vapor cavity is investigated. The computed frequency is compared to the results of 1D model and with experimental data. Amplitudes and frequencies of the pulsations agree well with experiment, showing the potential of the method to predict full-load surge." @default.
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- W2085243350 date "2014-03-01" @default.
- W2085243350 modified "2023-10-16" @default.
- W2085243350 title "Numerical simulation of full load surge in Francis turbines based on three-dimensional cavitating flow model" @default.
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- W2085243350 doi "https://doi.org/10.1088/1755-1315/22/3/032036" @default.
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