Analysis of Sediment and Water Flow and Erosion Characteristics of Large Pelton Turbine Injector

Based on the solid–liquid two-phase flow model, SST k-ω and Lagrangian equation model of particle motion, numerical simulations sediment–water in injector a large Pelton turbine were conducted. The distribution rules pressure, velocity, erosion rate, location obtained by analyzing characteristics sediment injector. results revealed that velocity trend water inside cylindrical jet exhibited nonlinear distribution, phenomenon “velocity deficit” occurred at end needle guide tip, resulting decrease quality diameter affected rate nozzle port ring. This study provided guidance for analysis prediction utility turbines.