Analysis on Erosion Characteristics of Liquid-solid Two Phase Flow for Key Structure of New Type Backflow Manifold
In order to study the erosion law of liquid-solid two-phase flow in the key structure of the new type of backflow manifold,the Euler Lagrange method in computational fluid dynamics was used to simulate the liquid-solid two-phase flow in the backflow manifold.The results show that the erosion area is mainly in the upper part of the guide surface of the wedge valve core when the throttle valve opening is less than 30％,and the erosion at the axis of the guide surface is the largest.When the throttle valve opening is higher than 30％,the main erosion area is at the inlet pipe of the fixed valve.The fluid velocity,mass flow rate and particle size have a greater impact on the erosion rate when the opening of the wedge valve is less than 40％,while the erosion rate changes slightly when the opening is greater than 40％.The particle impact is the main reason for the erosion of the wedge valve core,and the uneven distribution of wall velocity leads to the penetration and leakage on one side of the wedge valve.The installation of anti puncture short joints in the backflow manifold system and the use of appropriate valve openings can effectively reduce erosion of the backflow manifold.
万方数据
维普
