Research On Erosion Damage Of Metal Wall In Gas-solid Two-phase Flow

When the flowing medium contains solid particles,erosion is one of the important causes of damage to the wall of the flow equipment.Especially in the petrochemical industry,energy metallurgy,water conservancy and hydropower,aerospace and other industrial fields,the erosion damage of solid particles has become An important issue that threatens the production safety of equipment.The mechanism and influencing factors of material erosion damage caused by the impact of solid particles on the surface of the material are complex and diverse.Different material properties,particle geometric characteristics and impact conditions will all have an important impact on the erosion damage of the material.Studying the erosion damage behavior of solid particles is of great significance to ensure the safe operation and efficient operation of production equipment.Aiming at the erosion damage caused by spherical particles impacting plastic metal materials,this paper establishes a prediction model of the erosion rate of plastic metal materials under the impact of spherical particles.Based on the prediction results of material erosion damage,304 stainless steel and P110 steel target materials are selected,and the gas-solid two-phase flow erosion experiment device is used to test the influencing factors and changing laws of the erosion rate.The results of the two materials under different impact conditions are obtained.Erosion law.In addition,a multi-factor level orthogonal experiment is designed,and the experimental data is subjected to multiple nonlinear regression fitting to obtain the calculation formula of the erosion rate of 304 stainless steel and P110 steel,and the calculation results are compared with the experimental results to verify the accuracy of the calculation.The research results show that the calculation formulas for the erosion rate of 304 stainless steel and P110 steel obtained by fitting are more accurate,and the calculation results are in good agreement with the experimental results.When the impact angle of 304 stainless steel is large,the error between the calculated and experimental results is small,and the error is the smallest when the impact angle is 75°;when the impact angle is between 20° and 50°,the experimental value and the calculated value The difference is large,and the maximum error is at an angle of 30°.There is a certain deviation between the maximum erosion rate predicted by the calculation model and the experimental results.The maximum erosion rate obtained according to the experimental results is when the impact angle is 30°,the maximum erosion rate in the calculation model appears at 30° To 40°.The calculated value of the erosion rate of P110 steel is larger than the experimental value.The error between the experimental value and the calculated value is the smallest when the impact angle is 60°,and the error between the experimental value and the calculated value is the largest when the impact angle is 90°.At the same time,the prediction model can accurately predict the erosion rate of 304 stainless steel and P110 steel when the impact velocity is within 10 m/s-40 m/s and the particle size is 100 ?m-500 ?m.The prediction model provides a reference for analyzing the erosion damage of spherical particles in plastic metal materials under gas-solid two-phase flow,and provides a basis for the establishment of erosion damage models of spherical solid particles and the prediction of the erosion rate of plastic materials.