In order to explore the erosion wear mechanism of the 90° bend of a filling pipeline and reveal the influence of main factors on pipeline wear,fluid mechanics,material mechanics and other theories,the rheological parameters of filling slurry and the wear characteristics of pipeline were obtained based on rheology and by combining laboratory rheological experiment with numerical simulation.The erosion and wear mechanism of particles on the pipeline under different motion state was analyzed,and the rheo-logical experiment results showed that the plastic viscosity coefficient of the slurry was 0.231 and its shear rate had a linear relationship with the shear stress,which conformed to the Bingham model.Accord-ing to the force analysis results of slurry particles,the erosion wear of bent pipe was related to the flow form and motion state of slurry particles in the pipeline,with the main reason being the slip and transition movement of particles.The numerical simulation results showed that the area of turning angle 60°～85° was a serious area of erosion wear,and the wear rate of the lower side wall was much higher than that of the upper side wall.The erosion wear rate increased with the increase of the slurry flow rate.When the flow rate was 7 m/s,the wear rate was maximum.With the increase of the pipe diameter,the pressure difference at the bend decreased and the wear rate decreased.The wear rate was negatively correlated with the curvature radius of the pipe.The larger the curvature radius,the more uniform the distribution of slurry velocity field.
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