Adopting k-ε dual-equation turbulent model

and particles random collision model which takes wall surface roughness and particle's whirling factors etc.into account

as well as the frequency spectrum random track(FSRT) of particle's pulsation

the numerical simulation and calculation analysis for particle erosion wornout of 90° square bend pipe under several working conditions

such as different velocity of incoming flow

different particle size

different position of damper etc.

have been carried out

finding out the erosion worn-out behavior of particles onto the wall surface in the bend pipe.The easily worn-out location and erosion rate in the bend pipe have been systematically predicted

providing with numerical basis and theoritical reference for anti-erosion of pipeline in engineering practice.