Abstract
The hydraulic turbine performance is adversely affected by sediment erosion. The present study aims to explore the erosion behavior of radial hydraulic turbine. Numerous shapes, sizes, and concentrations of sediment particles striking the turbine were analyzed numerically and experimentally. Numerical analysis was performed in ANSYS-FLUENT and EDEM coupled system based on the Archard wear model, which is new for particle dynamics simulation within turbine. Experiments were performed by injecting various-sized particles into a transparent-casing turbine. The experimental analysis traced erosion in the blade's suction and leading side. The overall experimental uncertainty was 0.53%. Numerical analysis indicates that erosion occurs at the casing (62%), the blade's suction side (10.2%), and the leading side (12.9%). Finally, applying the genetic algorithm relationship between the normalized erosion rate density with the particle's velocity, size, concentration, and shape factor was established. Erosion loss increased with increased particle concentration and size and decreased shape factor.
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