Prediction for the Influence of Guide Vane Opening on the Radial Clearance Sediment Erosion of Runner in a Francis Turbine

In this paper, the Eulerian–Lagrangian method and Tabakoff erosion model are used to study solid–liquid two-phase flow in a Francis turbine. Through analysis of overall pattern, particle flow, concentration, wear bladeless area unit under different guide vane openings, influence runner radial gap on surrounding field characteristics openings is revealed. The results show that smaller opening vane, greater vortices pattern distribution runner. hydraulic turbine with optimal smallest. long-term inlet outlet will cause loss local structures, an increase clearance runner, leakage, vibration unit, reduction efficiency. research provide basis for structural optimization