In coal-fired power plants

the U-type bend is commonly used in the pipe system due to the constraints of outer space. In these pipelines

the flow of solid particles is gas-solid two-phase flow with high Reynolds number. The erosion on the tube wall seriously affects the safety operation of the power plant. In this paper

the erosion characteristics of the U-type bend were investigated through the computational fluid dynamics(CFD) method. The wear distribution on the tube wall was obtained

and the particle flow characteristics in the U-type bend were analyzed. Moreover

the influence of inlet velocity

mass loading rate and particle size on the erosion rate was studied. The result shows that

within the study scope

the maximum erosion rate increases exponentially with the inlet velocity and linearly with the mass loading rate. Additionally

increasing the particle size can also aggravate the wear on the tube wall.