Numerical Simulation and Experimental Validation of the Erosion Behaviour of X65 Pipeline Steel under Different Flow Velocities and Sand Concentrations

摘要

The erosion behaviour of X65 pipeline steel in simulated formation water was investigated underdifferent flow velocities and sand concentrations by using numerical simulation and experimentalmethods. In the numerical simulation, the geometry model was first built according to the erosion loopsystem in the experimental test, and then the shear stress transport (SST) k-ω turbulence model and thediscrete phase model (DPM) were applied to simulate the fluid path and the erosion rate during theerosion process. In the experimental test, the erosion rate of X65 steel was determined under differentflow velocities and sand concentrations by using a water-sand erosion loop system. The numericalsimulation and experimental results showed that the erosion rate of X65 steel clearly increased with theincreasing flow velocity and sand concentration, and there is good agreement between the numericalsimulation erosion rate and the experimental results.