Numerical Simulation Of Multiphase Flow Erosion In Oil Pipeline

Pressure pipeline is an important transportation equipment in industrial production.How to ensure its safe operation has always been a hot spot in industrial and academic research hotspot.Erosion failure is a common form of failure in various pipeline failure cases,and it is an important cause of a large number of damage to various pumps,valves,pipes and other overcurrent components in the petroleum,chemical,metallurgical and other industries.Especially when the fluid is a two-phase flow or a multi-phase flow,such as when the solid phase particles are present to form a so-called liquid-solid two-phase flow,the erosion corrosion is more likely to cause structural thinning or perforation.Therefore,it is very important economic and social significance for ensuring the safe operation of pipelines and preventing the occurrence of accidents to study the erosion and thinning of typical pipe fittings in pressure pipelines.The actual working conditions of pipeline pipelines are prone to erosion and corrosion,and cause accidents such as leakage of industrial equipment were taken into condition in this paper,the CFD technology and the erosion model in the discrete model(DPM)were used to simulate the typical pipeline components in the industry,and the following results can be obtained.The CFD technology was used to simulate the characteristic of Fluid dynamics of Y-shaped pipe fittings in oil and gas gathering pipeline network,and the effects of varying flow fields on the internal corrosion of pipelines under different flow conditions was explored.The erosion of the pipeline to the pipeline is becoming more severe with the increase of the inlet flow rate and the viscosity of the oil;The erosion of the pipeline to the pipeline is becoming more weak with the increase of the gas content of the oil transported in the pipeline and the diameter of the pipe;The erosion of thepipeline to the pipeline is becoming more weak with the increase of the angle of the Y-shaped pipe branch,and when the angle in between120° and 180°,the erosion of the pipe is similar.The numerical simulation were studied are for sudden expansion and expansion of pipe fittings that are very common in industrial piping systems.The most severe areas of erosion are mainly distributed near the sudden expansion pipe section;the disturbance of fluid is small in the first half and the second half of the pipe section.The CFD method and FLUENT were applied to numerically simulate the erosion of the pipeline during the transportation of industrial medium in the most common elbow in the industry.The erosion corrosion distribution and characteristics under different working conditions,such as different inlet speeds and different geometric parameters were calculated.The largest impact of erosion corrosion is concentrated near the bend;the erosion corrosion rate is proportional to inlet flow rate and pipe diameter;the erosion corrosion phenomenon gradually decreases with the increase of the pipe radius of curvature.It has a positive and important role in ensuring the safe operation of pipelines,improving detection efficiency,and optimizing design.