以液固两相流条件下的90°竖直弯管为研究对象，建立冲蚀模型，利用ANSYS-Fluent软件对A、B、C、D四种流向的弯管进行冲刷腐蚀数值模拟。同时建立室内冲蚀试验平台，分析了颗粒入口流速、粒径和质量流量三个参数对四种流向条件下弯管的冲蚀破坏规律并与模拟结果进行对比。结果表明：试验结果与模拟结果基本吻合，入口流速和粒径对弯管的冲蚀影响最大；且随着颗粒入口流速的增大，流场中开始出现二次流。当颗粒入口流速较小时，A型流向条件下弯管的冲蚀破坏最严重；而当颗粒入口流速较大时，由于二次流加剧冲刷，B型流向条件下弯管的冲蚀破坏最严重，A型、C型流向条件下的次之，D型流向条件下的弯管冲蚀破坏最小。

A 90° vertical bend under the condition of liquid-solid two-phase flow was taken as the research object, and an erosion model was established. ANSYS-Fluent software was used to simulate the erosion corrosion of four flow tubes A, B, C and D. At the same time, an indoor erosion test platform was established, and the erosion failure law of the three parameters of particle inlet flow velocity, particle size and mass flow rate under four flow conditions was analyzed and compared with the simulation results. The results show that the experimental results were basically consistent with the simulation results, and the inlet flow velocity and particle size had the greatest influence on the erosion of the bend, and as the particle inlet flow rate increased, secondary flow began to appear in the flow field. When the particle inlet flow rate was small, the erosion of the elbow in the type A flow direction was the most severe. When the particle inlet flow velocity was large, the erosion bend under B-type flow direction condition was the most serious due to the secondary flow intensified, and the A-type and C-type flow conditions are the second, and the erosion of the bend under D-flow conditions was minimal.