Hydraulic Design Principles of Vanes and Runners for the Double-stage Tubular Turbine
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Abstract:
This paper derived the parameter design formulas for the first-grade guide vane, the first-grade runner, the second-grade guide vane, and the second-grade runner of a new type of double-stage tubular turbine. The commercial software Fluent was used to analyze the numerical performance of the turbine under design conditions. The Reynolds averaged Navier-Stokes equation was applied as the control equation in numerical calculation, and the k-ε model was selected as the turbulence model. The streamline diagram of the turbine, the pressure distribution patterns on the pressure surface and suction surface of the guide blade and runner vane, and the velocity vector map of the central symmetric surface at x=0.0835 were obtained, which can demonstrate the accuracy of turbine design.
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